AITA for setting a boundary refusing to speak to my baby daddy’s girlfriend about his child support?
A single mother raising two autistic boys draws a line when her ex’s girlfriend, once her best friend, tries to meddle in child support discussions after years of her ex’s neglect. With $30,000 in unpaid support and wages now garnished, tensions flare as the girlfriend sends heated messages, prompting a firm boundary.
This story dives into the messy realities of co-parenting, betrayal, and financial accountability. Was the mother’s refusal to engage with her ex’s girlfriend reasonable, or did she escalate unnecessarily? Reddit’s feedback strongly supports her stance, urging her to protect her peace and her children’s rights.

The mother has been solely responsible for her two autistic sons, with minimal support from their father.


Wage garnishment at 60% for $30,000 in back child support triggered a reaction from her ex, likely influenced by his girlfriend.


Her attempt to discuss the issue with her ex was derailed by his girlfriend’s interference, prompting a clear boundary.



The girlfriend’s aggressive response escalated, but the mother held firm, documenting everything.


This situation underscores the complexities of co-parenting with an uninvolved ex and the added strain of betrayal from a former friend. The mother’s boundary—limiting child support discussions to her ex—is a healthy assertion of her rights as the primary caregiver. Her ex’s failure to support their autistic sons, coupled with his girlfriend’s overstepping, justifies her firm stance.
Dr. Philip McGraw, a family dynamics expert, emphasizes, “Boundaries are essential in co-parenting to maintain focus on the children’s needs, especially when third parties try to interfere” (Family First, 2005). The girlfriend’s involvement, particularly given her history as the mother’s best friend, likely stems from financial strain caused by the garnishment, but it’s irrelevant to the legal and moral obligation of child support.
Societally, child support disputes often carry stigma, with single mothers like the OP facing unfair scrutiny. Her ex’s minimal contributions and the girlfriend’s aggressive messages suggest an attempt to shift blame rather than address his responsibilities. The mother’s decision to document communications is wise, as it protects her legally in case of harassment.
The girlfriend’s betrayal, moving in with the ex immediately after the breakup, adds emotional weight, but the mother’s focus on her sons’ needs is commendable. For resolution, she should continue communicating only through legal channels, such as her lawyer or the court, to avoid further drama. Offering her ex a structured way to discuss support, like written correspondence, could maintain clarity without involving his girlfriend.
Here’s what Redditors had to say:
Redditors overwhelmingly supported the mother’s boundary, condemning the ex’s neglect and the girlfriend’s interference.




Some emphasized legal protection and the girlfriend’s overstepping due to her personal stake.



A few highlighted the girlfriend’s betrayal and the ex’s failure as a father.

![[Reddit User] − NTA - She should be grateful you are talking to her at all after everything she's done](https://en.aubtu.biz/wp-content/uploads/2025/09/wp-editor-1758700070231-2.webp)
![[Reddit User] − NTA While I understand that his wage garnishment probably affects her quality of life, that's for her to discuss with *him*. It is nothing to do with...](https://en.aubtu.biz/wp-content/uploads/2025/09/wp-editor-1758700070877-3.webp)

The mother’s firm boundary against discussing child support with her ex’s girlfriend was a justified move to protect her sons’ rights and her own peace. Her ex’s neglect and the girlfriend’s betrayal—compounded by her history as a close friend—make the situation emotionally charged, but the mother’s focus on her children is spot-on. Should she keep all communication court-based, or allow limited talks with her ex? What’s your take?

