Will she get the damage she done back?

Hello I’m sorry if I’m writing a bit confused but I’m at rock bottom. I found out that my ex cheated on me and she konverted to Islam at said all the time things like how can you say this be fearful of god and so on but right now during Ramadan she is getting f…ed in a hotel from the person she betrayed me with and I’m full of hatred and wanna make a dua so that she will get everything back and her life should be a living hell and so on. So my question is can I make a dua to get my revenge on her and wish her everything bad or am I the bad person when I do this? Sorry if this sounds a bit harsh but I’m finished with my life right now