My guess is since you're asking, you don't feel great about it. I think you should get yourself out of the situation, because it is a lose-lose one in the end. Who knows how many men she is sleeping with if she is cheating on her husband. If he ever found out, he could place the blame on you and not her and come after you.

I had some guy ask me for my number one time. A few days later I got a call from his angry girlfriend. I told her the blame was misplaced and did she honestly think he told me he had a gf when he asked for my number?

Piper is exactly right. IF any the women that i had slep with had husbands that showed up, i would've told then that it's not me they should be angry with. Also, if she's sleeping with you, then what does say about her ? As bad as my marriage was, i didn't sleep with another woman until i was no longer physically living with my stbx.
One last note....if you're sleeping with a married woman, there's a married MAN out there as well...and he may just come gunning for you. And no pussy is worth dying over.

Whether or not you should feel guilty is a function of your personal morals and ethics.

You are with a woman who has made a vow to another and is now breaking it. What difference does it make if the other is a friend of yours or not?

I believe the greatest question is "Why has she abandoned her vow?"

I had a situation where I developed a relationship with a woman. She swore up and down that she was going to divorce & ultimately she did, but at the time we were going together she was simply separated, not divorced. & we broke up when she said that she was going back to him. She divorced 2 months later but we were never more than casual friends after the breakup.
But to answer your ? I didn't feel guilty at the time b/c I took her word for it and felt the relationship was DEAD w/ her husband. She promised and swore on that several times.
But then when she said she was going back to him, I felt very guilty b/c the idea that she was "over him" wasn't really true.

bad karma and how can you trust someone like that what makes you so special to think that she is not messing around with a bunch of other guys besides you ... if you get married this will happen to you .

actually the "bad karma" is pretty direct! if the woman will cheat on the husband, there's a good chance she could cheat on you if you 2 really got together

Read some posts on the Infidelity site here on Daily Strength and get an idea of the pain and agony that cheating causes on the spouse when they find out (and they always do). The years of missery for a piece of ass is never worth it, for both the cheater and the cheatee! There's pleanty of ass out there w/out having to f*ck a married person!

Dude. Karma is a Bitch and she has a Loooong memory, trust me. I will repost something I put on another question: I remember the collapse of my first marriage; it wouldn't have been so bad if she'd left me THEN started auditioning my replacements... I swore right then I would Never cheat on my Other, because it felt like open-heart surgery performed with a dull spoon and no anesthesia. "It is no kindness to hang a man slowly..."

Nevermind the obvious hazard of getting one's arse shot off... and Nobody would feel sorry for you.

Um...yes...you should feel guilty. God's "tuggin'" on ya.

This is a old post lol but learn my lesson

How'd it work out?

I left her alone it wasn't fair to her husband she wanted it both ways have a husband to take care of her and fun on the side.

The duplicitous, vanitrous little vixen.

Good man. Good to know there's honor among some men. She musta been one sexy little number!

This is an interesting question. I don't think it's really as black and white as it seems on the surface. I think if it was a one night stand and I didn't know her and would never see her again, I might not care, especially if alcohol was involved. But if it was a recurring thing I probably would feel guilty, eventually. And if I started getting emotionally attached, I'd have to break it off for my sake.