Should I beat her up?

I don't know why my boyfriend's baby mother keeps on contacting him saying she let his cousin c*m inside of her 2 years ago and she sucked his D. She is upsetting my man. She will not leave him alone. Every time she makes him mad, he tells me to leave him alone. This is the same girl who is pregnant by him. I don't understand why he's upset when she clearly said in a text she liked his cousin more and she wanted to be pregnant by his cousin instead. She is ruining our relationship by making him upset. Should i beat her up? She is VERYYYY annoying!!
Should I beat her up?
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