Considering telling ex-emotional affair partner's husband

Title pretty much says it all.

I'm considering sending him our text screenshots. Some of them are just us flirting back and forth and some are her telling me how terrible he is and I'm considering sending them to him to hurt her worse than she hurt me. She used me.

One one hand I still love her and if I do this I know everything is done.

On the other, she deserves it and this poor clueless bastard is just dashing around buying her flowers for Valentine's Day after she spent months telling me her marriage was over and used me.

Don't know what I want to do just yet. Not sure how bad a person I am for even considering it.