How Badmouthing Your Co-Parent Damages Your Child

Jul 24, 2025By Cori McGuire
Cori McGuire

As your Parenting Coordinator, I understand that co-parenting can be incredibly challenging. There are often strong emotions, differing perspectives, and a history that can make it difficult to communicate directly with your co-parent. In these moments, it can be tempting to seek support from outside parties – teachers, coaches, doctors, daycare providers, even extended family – to validate your concerns or to try and gain an "upper hand." This badmouthing behavior is known as "triangulation", and while it may seem like a way to help your child or to address perceived problems, it often has profound and lasting negative consequences for your children.

What is Triangulation in Co-Parenting?

Triangulation occurs when one parent attempts to involve a third party in their conflict or disagreement with the other parent. This often involves:

  • Badmouthing or criticizing the other parent to teachers, coaches, doctors, or other professionals.
    Sharing confidential co-parenting disputes with these third parties.
  • Seeking validation or favoritism from caregivers to undermine the other parent's role or decisions.
  • Using the child as a messenger or a source of information about the other parent's activities.

    The False Promise vs. The Real Harm

You might believe that by sharing your concerns with third parties, you are:

  • Helping your child: By alerting others to what you perceive as your co-parent's shortcomings.
  • Protecting your child: By ensuring others are aware of perceived "irresponsible" or "negligent" behavior.
  • Gaining an advantage: In potential future legal proceedings or simply feeling "heard" and supported.

However, the reality is far different. While your intentions may stem from a desire to help your child, the actual impact of triangulation is deeply damaging, creating an emotional and psychological burden on the child including:

  • Loyalty Conflicts: children are put in an impossible position when one parent badmouths the other. They feel torn and forced to choose sides, leading to immense emotional distress and guilt contrary to s. 37 emotional best interests of the child.  They love both parents and need to feel secure in those relationships.
  • Embarrassment and Shame: Hearing a parent criticize the other, especially to outside adults, causes profound embarrassment and shame for the child. It undermines their sense of family stability contrary to s. 37 best interests of the child and their own identity.
  • Anxiety and Insecurity: When parents engage in conflict through third parties, children sense the underlying tension and instability. This can lead to increased anxiety, insecurity, and even depression, contrary to s. 37 emotional and security best interests.

Modeling Unhealthy Conflict Resolution

Children learn how to navigate relationships by observing their parents. Triangulation teaches them that indirect, manipulative, and conflict-avoidant (for the parent, not the child) methods are acceptable ways to deal with disagreements, rather than direct communication and problem-solving.

Triangulation destroys any potential for effective co-parenting. It fosters resentment, distrust, and makes it incredibly difficult for parents to work together for their child's benefit.

Many professionals (teachers, doctors, specialists) will actively avoid families embroiled in parental conflict and triangulation. They are not there to take sides, and involvement in parental disputes can be professionally problematic. This means your child may lose out on crucial support, special education services, or even necessary medical care because caregivers are reluctant to get involved in the "drama." This is an unintended, but very real, consequence.

Dr. Joan Kelly's Research

Decades of social science research consistently show that children thrive when they have secure, loving, and consistent relationships with both parents. Dr. Joan Kelly, a renowned psychologist and researcher in high-conflict divorce, emphasizes the critical need for children to maintain a healthy bond with both parents, viewing them as capable and valuable caregivers, regardless of the parents' personal differences.


A child's self-esteem and identity are intrinsically linked to their perception of their parents. When one parent consistently belittles the other, it implicitly belittles a part of the child, who is a product of both parents.

Children from high-conflict homes, especially those where triangulation is prevalent, often have reduced emotional resilience and coping skills.

What Children Really Need (Dr. Joan Kelly's Insights & More)

Children's fundamental needs in separation and divorce, as highlighted by Dr. Joan Kelly and other researchers, include:

  • Security and Stability: Children need to feel safe and secure in their daily lives and in their relationships with both parents.
  • Love and Affection from Both Parents: They need to know that both parents love them and are committed to their well-being.
  • Freedom from Loyalty Conflicts: They should never be put in a position where they feel they have to choose one parent over the other.
  • Permission to Love Both Parents: Children need explicit and implicit permission from both parents to love and bond with the other parent without guilt or fear of reprisal.

Parents Who Can Co-Parent Effectively

Even if not friends, parents need to be able to communicate respectfully and make joint decisions about their children without involving them in conflict. Children benefit greatly when both parents are seen as competent and loving caregivers, even if their parenting styles differ.

Your child's emotional well-being depends on your ability to manage your co-parenting relationship in a healthy way. This means:

  • Address concerns directly with your co-parent whenever possible. If direct communication is too difficult, utilize your PC to facilitate discussions and decision-making.
  • Shield your child from parental disputes. Never badmouth the other parent in front of your child or to third parties.
  • Encourage and support your child's bond with their other parent. Speak positively (or neutrally) about them in front of your child.
  • When interacting with teachers, doctors, or coaches, keep the focus solely on your child's needs and progress, not on your issues with the other parent. Allow them to communicate with both parents directly.

Effective Strategies for Managing Co-Parenting Conflict (Beyond Triangulation)

So, if triangulation is harmful, what do you do when you're frustrated, angry, or fearful about your co-parent's actions? Here are more constructive approaches:

1. Bill Eddy's Four Steps for Managing High-Conflict Personalities (and Ourselves!):

Bill Eddy, a leading expert in high-conflict disputes, advocates for a structured approach to communication. While his work often focuses on managing "high-conflict personalities," these steps are incredibly useful for anyone struggling with intense emotions and difficult co-parenting interactions:

  • Manage Your Emotions: Before you respond to your co-parent or take any action, take a pause. Breathe. Don't react impulsively. Emotional responses often escalate conflict.
  • Flexible Thinking: Challenge your own assumptions. Is there another way to see this situation? Are you focusing only on the negative? Can you identify what you do want as an outcome, rather than just what you don't want?
  • Manage Your Behavior: Focus on what you can control – your words, your actions, your responses. Use brief, informative, friendly, and firm (BIFF) communication. Avoid accusations, blame, or dredging up the past.
  • Check Yourself: Regularly reflect on your interactions. Are you falling back into old patterns? Are you being respectful and child-focused?

2. The Power of Self-Correction and Repair with Your Child

We all make mistakes, especially under stress. If you realize you've triangulated or badmouthed your co-parent in front of your child, it's never too late to repair the damage.

Catch yourself the moment you realize you've slipped, pause. Make a statement to your child such as, "Honey, I realize I just said something negative about Dad. That wasn't fair. I'm sorry. We both  love you and it's important that you have a good relationship with both of us. My feelings about Dad are my own, and I shouldn't put them on you."

Continually Check Yourself. Make it a conscious practice to monitor your language and behavior. The more you practice, the easier it becomes.

3. Seek Professional Guidance (Beyond the PC):

Go to individual counseling. Make your tendency to triangulate, your anger, fear, or anxiety about the co-parenting relationship a specific goal with your therapist. A counselor can help you:

  • Develop healthier coping mechanisms for stress and conflict.
  • Process past hurts and fears that contribute to current conflict.
  • Learn assertive communication skills.
  • Develop strategies for emotional regulation.

    Make Peace with the Past. This is often a significant hurdle for parents. Recognize that the intense anxieties and fears you feel may be rooted in very real, painful situations from the past. However, understand that the context has changed. You are no longer in the same relationship dynamic. People can learn and grow. While challenging, it's possible for individuals to change. Your focus is now the child. Your energy is best spent on creating stability for your child, rather than reliving past conflicts.

    This deep personal work often requires the support of a therapist or counselor. Discuss this openly with your Parenting Coordinator; we can help you maintain a child-focused perspective while you do this personal work.

4. What to Say to Your Child When You're Genuinely Concerned (But It's Not a child protection Issue)

Sometimes, your concerns might be legitimate (e.g., co-parent is consistently late, inconsistent with homework, has a different parenting style that you disagree with), but not reach the level of child abuse/neglect. In these cases, your child might notice issues.

  • Validate their feelings, but don't involve them in the solution. "I understand that [situation, e.g., 'it's frustrating when you're late for school after being at Dad's house'] / 'I know it can be confusing when Mom does things differently.'
  • Reassure them of your commitment to address it. "I'm going to communicate to [other parent] about this so we can figure it out. It's my job as a parent to work with your [other parent] to make sure things run smoothly for you."
  • Reinforce their safety and love. "You are safe, and you are loved by both of us. We are both working to do our best for you."
  • Never burden them with the problem or the resolution process.

Your commitment to these more effective strategies will not only reduce conflict but, most importantly, provide your child with the emotional security, stability, and positive role modeling they  need to thrive. In conclusion, while the urge to involve others in your co-parenting challenges can be strong, remember that the ultimate cost is borne by your child.

By choosing direct communication, respectful boundaries, and prioritizing your child's fundamental need for a secure relationship with both parents, you provide them with emotional security and stability, their foundation for healthy development.

Addressing Real Dangers: A Crucial Caveat

This article focuses on the dynamics of co-parenting conflict and triangulation, which often stem from interpersonal struggles, insecurity, and a desire for control. However, it is critically important to understand that this information DOES NOT apply to situations where a child's safety is genuinely at risk due to issues such as:

  • Suspected or confirmed alcohol or drug addiction of a parent.
  • Concerns about physical abuse, sexual abuse, or severe neglect.
  • Ongoing and severe verbal or emotional abuse directed at the child.

If you have legitimate concerns about your child's safety due to these types of issues, these are not co-parenting disputes to be managed through typical communication strategies. These are child protection issues that must be discussed with your PC, your lawyer and likely legally require a report to child protection authorities under the Child and Family Community services Act (sections 13-14). This article is designed to help parents manage conflict and communication in healthy ways, not to address situations that require child protective intervention.

Cori L. McGuire Law Corporation provides PC services to families across BC: Kelowna, Kamloops, Vancouver, Victoria, Prince George, and rural communities.