Wife won’t delete the person she cheated on me with.

I’ve gotten past the betrayal, for the most part, but there’s one sticking point.

She won’t remove the person she betrayed me with from her social media or anything. I’m hung up on it and she says she’s not removing him because she wants to be nosey.

This is obviously a bad sign, I trust that she isn’t partaking in anything anymore. He’s a whole country away, but the fact he’s still there and his name is popping up every now and then (not as a direct response to messages or anything like that, just “so-and-so posted this have you seen” etc etc) just brings everything coursing back.

I should bring this up again I guess.