ULPT Request: Dated her a year, found she's married. How to break them up?

I met this girl and fell in love with her, and she swore she loved me too. After about a year of dating, I started noticing strange behavior from her. I found out she’s married. I don’t have Instagram, but I saw her profile and she even shows off her husband and says in their photos how much she loves him and that he’s the love of her life. I confronted her and she said it was true, and that she loved both of us, but had to choose, and she chose her husband. She ghosted me, blocked me everywhere, and I never heard from her again. I want unethical advice to make them break up and ruin that marriage. Partly for revenge, and partly because I feel bad for the other guy, he gives everything for her and doesn’t know what kind of woman she really is. Edit: I deleted all the conversations and photos we had together so I can't send them to him.