A with a dash of C.

This is such a lame ass excuse. Like she wouldn't know it was her just from reading the thread.

Never going to be pictures ITT.

What? The guy is ****ing your girl almost certainly knowing that she's cheating on you.

The guy isn't meant to look out for OP nor have a duty to him to turn his gf down on those grounds. If the gf wants to cheat then that's her choice, he's not the moral police.

i wouldnt send the pics, but if her parents like you id definitely tell them that she cheated (and still cheats) on you, so that they see what a slut their daughter is.

and tell the guy's wife.

It's pretty basic guy code that if a guy ****s your girl you kick his ass. If kicking his ass isn't possible you move on to other forms of vengence.

This is bull****. People cheat for lots of reasons. Women like to perpetuate this myth that they only cheat because their man is doing something wrong, but sometimes they just want to **** somebody else.

OP: Do not tell the guy's wife. For all you know, they have an open relationship. Or she knows but pretends not to to maintain a happy marriage. Or, ultimately, it's none of your damn business what happens in their marriage, and messing with their life because your gf ****ed around on you is really petty and stupid.

Talk to your gf like an adult, tell her it's over (which it seems you've decided?) and kick her out. She can keep in touch by check until you find new tenants for the apartment. Do NOT keep living with her.

This. It's not necessarily a matter of getting revenge.

But A is a good idea.

how I read this. I am pretty sure its more correct this way.

If you want revenge you need to attack what is the most important to her.

Say its her social circle.
Get her email she uses on facebook, hijack email and facebook and let everyone know she is worthless whore.

Tbh, even tho this prob made you feel like **** and your first reaction is to make her feel the same way its not worth it. Def break up and move on asap.

If I were feeling vindictive.

Obtain definitive documentation. Change locks on apt. Create 3 sets of info. Mail one to wife, one to girlfriends parents, and take one and post it to the front door. Do not answer when she knocks.

However, I am in the camp that doing stuff like this just makes you look like the bad guy when obviously you are not (at least in this case). My real instinct is just to tell the owner of the apt that you are breaking the lease. Tell them to take the security deposit for the 1 mo rent you are probably going to owe to break the lease and head for a friends couch until you find a new place to live. Rent storage for your crap and move it out while she is at work. Leave a note that says you know she was cheating and don't trust her so she should not contact you again. Also tell her she has to leave as you have rescinded the lease. Trust me that note will hurt more than any vindictive crap you pull and allows you to take the high ground.

zero

Your chosen form of vengeance inflicts a lot of suffering on the dude's wife and kid. I can certainly see why you'd want to do it, but it also pretty clearly seems like an ******* move to me.

Just leave is the correct decision. Anything else makes you look crazy which is not good.

I wouldn't rat out the guy to his wife

Go with A. better to be civil in these types of situations. you have your whole life ahead of you.

Do you not mind looking like a maniac?

Was she one of those "cheating is so ****ed up chicks"?

If you answered yes to either question you should go bat **** crazy post pics, tell wife, parents, ruin lives, etc...

oh yeah and make sure to post results!

Was she still having sex with you in the last month too?

Stay out of other people's business. Dump the girl and move on with your life. If you do anything other than this you will regret it, and the dude has a kid, quit thinking about screwing around with families.

I'd rat the guy out, but I'm a vindictive ****er.

I'd also try for one last hate-bang if she doesn't know you know yet and then just abuse and defile her.

It's "**** You, and **** Her Too", not "**** Her, but whatever man I understand we're cool".

There is nothing to be vindictive about. It isn't like the guy was OP's friend. He didn't owe OP anything. Striking out at him is just that -- striking out because you're hurt. I don't necessarily see anything wrong with that but it isn't vengeance.

With striking back you have to do it so that no one finds out because otherwise you look crazy which is much worse.

Pretty much exactly this. You have no right to **** up the other dude's life just because you're gf is a slut. A is really the best option for the mid-long run. Short run c and b may make you feel better, but it's really not the case. Plus, you get to make your gf feel really guilty and feel like she's missing out on a genuinely classy guy, which is prolly good revenge considering that it'll eat her up inside. She'll also try to get back with you if you do a, so if you ever want casual sex it's prolly a good route to go, but it'll prolly be really unhealthy for both involved.

If the other guys wife figured it out before you did would you want her to tell you?

Meh. I agree that there isn't any real moral imperative against hooking up with a girl who has a boyfriend, but there's a "buyer beware" to the whole thing. You have to know that when you choose to engage in this kind of activity, you're risking an ass-kicking if you're found out.

I'm not advocating that OP go crazy over this, but I also wouldn't feel sorry for the married guy if OP blew him up. It's the risk that he knowingly runs.

Sorry, other guy knew she had a boyfriend.

**** him, he is not blameless in this whole thing. He should have picked some other saps gf, because this sap is gonna **** up his ****, but good!