Mom vowed her 4-year-old wouldn’t dye her hair until 18. Then she came home to find her ex’s girlfriend had done it anyway

One mom is venting out her frustration after her parenting boundaries were crossed by the co-parent's girlfriend. In a series of TikTok videos starting September 1, 2026, Serenity (@renwithoutcontext) shared an episode where she came home to find that the girlfriend dyed her 4-year-old daughter’s hair purple without consulting her. Serenity had strictly instructed that her daughter’s natural hair was not to be touched. Having this instruction disobeyed left her feeling mistrustful, disrespected, and anxious as a co-parent. Her videos have racked up more than 19 million views.

Boundary-crossing behavior 

Originally, Serenity’s daughter had red ginger hair, so beautiful that she insisted on not giving her a haircut till she turned 18. “This hair doesn’t need to be tampered with,” she had declared to everyone as a co-parent. Not heeding her preference, the co-parent's girlfriend recently dyed the entire underside of her child’s hair purple. So she reached out to TikTok to ask whether it is possible to get the dye out without ruining the hair. “If it would have been a strip of hair, I wouldn't be acting the way that I'm acting, but it's the entire underside of her hair,” she described, adding that the episode left her fuming and frustrated. In another video, she even said that the color was strong and would remain even after four weeks.

Excluding one parent restricts child development

Excluding one parent from decision-making, just as Serenity experienced, restricts their cooperation and interferes with the child-centric shared responsibility in co-parenting. Unilateral decision-making is often not compatible with co-parenting. A U.S. study using data on nonresident-father families found that nearly one-third of separated parents never discussed child-rearing with each other, while about 65% of nonresident fathers did not influence major child-rearing decisions. At a later follow-up, 42% of parents reported no child-rearing discussions, and roughly 70% said the nonresident father did not influence major decisions.

Girlfriends don't have parenting rights

Serenity’s videos were met with mixed reactions from viewers. Some of them even responded with backlash, saying it’s the daughter who wants to matter in this situation more than the feelings of her mom or the conflict between parents. @legendarysteve questioned, “I’m not team mom or dad; I’m team daughter (it is her hair). Did she want it?” On a different note, @fairymaryyyyyy reflected, “The girlfriend is 100 percent wrong. But also, it’s kind of wild to say your daughter can’t do anything to her own hair until she’s 18 because of your feelings about her natural color. Bodily autonomy is important for children.”

You can follow Serenity (@renwithoutcontext) on TikTok for lifestyle content.

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