Am i wrong for using my husband’s affair with my cousin against them?

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She had taken out student loans since she knew she could pay them back.

She also chose a degree that was not exactly in the STEM areas so she will not be making a great salary coming out of school.

My ex is begging me to let him stay because he loves me.

I said that he would not sleep with other women if he loved me. I know he doesn’t.

He just did the math and found out how fucked he is.

My aunt and uncle are pissed off at me for screwing their baby out of so much money. I want to be clear here.

It was never my intention to take her money.

I just wanted our grandparents to not give it to her. Me getting it was just frosting on the cake.

Right now, the family is divided but mostly on my side. They do not want to openly disagree with my grandparents.

Everything is over and done with.

The divorce will take a little more time but my money is in my retirement account.

My ex is out of my house. And my cousin can go fuck herself.

I feel guilty about not confronting them immediately and for bringing my grandparents into it.

My ex asked me how I knew. I told the dumbass his texts were all showing up on our tablet before he deleted them.

I had screenshots of everything.

So I guess I’m asking if I went too far and whether that makes me the only asshole in this situation.