I think I’m getting attracted to my friend’s affair partner and I don’t know what to do

I need to get this off my chest because it’s been messing with my mind lately. Me and my close male friend are both married. He has been involved with a woman who is also married, and he tells me a lot about their relationship. Sometimes a little too much.

Whenever he’s talking to her and I’m around, she ends up joining the conversation. She gets very flirty with him on call—even when I can hear everything. Lately she has started trying to talk to me too. She asks him to put me on the call, tries to start conversations, and honestly… it feels like she might be a little interested.

And here’s my problem: I’m starting to feel attracted to her too.

I know it’s wrong. I know it’s messy. But something about the whole situation is pulling me in, and it’s confusing me. I’ve always had a fantasy about older/experienced women, and I think that’s getting mixed with the real-life situation now.

I’m not proud of it, but I needed to confess somewhere. I’m stuck between guilt, curiosity, attraction, and responsibility.

I don’t know what the right thing to do is, and I don’t want to ruin anyone’s life—including my own. But the temptation is getting stronger.

What should I do?