I have no idea what went on between the 2 of them however, those pix do not convince me that she was punched in the mouth as her lips show no sign of splits or bruising plus, those after teeth don’t look like ‘punched’ teeth! JMO.
Here are two stories that echo your thoughts. First, her dentist's office tells a different story than she does. And, the family court referee/judge rules in Mel's favor, apparently unconvinced that Mel posses any threat to the child.