I'm incredibly tired of this one particular girl touching my belly! everytime she sees me (1 or 2 times a week) she…

I'm incredibly tired of this one particular girl touching my belly! everytime she sees me (1 or 2 times a week) she touches my belly. I don't wanna be mean but omg. it wouldn't bother me if she would ask but no she comes up and rubs it like it's her own. I can be sitting down, leaning forward and have my arms wrapped around my belly and she still does it! can I just break her hand yet??