Babymomma, baby daddy, and girlfriend

dreadedbeauty • The weirdo corner
So I was just cruising on Facebook and saw a post with this girl saying how her baby's father called her and told her he whooped his younger son and not to be alarmed by the marks left on his body. So when she went to get the boys she asked her son why he got a spanking and the little one said daddies girlfriend spanked me. After her probing and getting information she gets home and sees this child's body. He had marks all over his back, legs and butt. Apparently the child and girl were laying on the bed and the baby dropped the iPad on the girls face and she got mad and started to curse this child out. The father tried to cover her tracks by saying it was him. Now being the person I am....this young lady wouldn't have been able to walk the next day. I have no children yet and I'm already over protective of my eggs! I literally would have hung this heffa upside down and gave her a good ole ass beating for touching my child. Yesssss I know then my child will be without a mother but at the end of the day I bet she will think before she raises her hand to another child that she didn't give birth to. What are your thoughts? I'll post screenshots of the post once I find it again.
UPDATE: I found the post. Pics of her post and a photo of the girl. Warning my story may be a bit off but I've provided receipts.