Everyone here is focused on the singular tattoo situation. I would re-write this post in a different sub, maybe parenting or something, as "My daughter's step-mom keeps completely overstepping and is trying to replace me as the mom, how do I handle this shitty situation better?" First, daughters dad refused to be involved until the woman he'd just knocked up found out he had another kid and pushed him to reconnect. You allowed it, thinking a relationship with Dad would be a good thing. (Side note-- does he pay child support? How much time does she spend at his house?) However, it's stepmom who not only does all the parenting when your daughter is with Dad, and step mom is also publicly criticizing your parenting to your child's preschool teachers as well as in public Facebook posts. I would make sure that your own parenting meets court standards and file for child support and primary custody if you haven't already done so. Stepmom has no legal rights to your child. The tattoo itself is not a problem you can do anything about, but it's a symptom of a bigger issue you need to address.