Is it normal to find your gf haveing sex and then haveing a three sum

No it is not normal she is cheating on you.

Pussy whipped freak!!!

She played you. You should throw her out on the streets.

I like freaky sex so I would jump in . but, I like the idea of you bringing someone home yourself to fuck her also. tell her you also want a threesome and see if she sucks and fucks him with no problem, or try it with a girl and see if she goes for that. if she does, you are a lucky man. if not, then fuck that whore.make sure you let her walk into it unexpected also. I am 100% serious. if shes down, keep her if you love her. as long as you are the one she loves, dp her and make her happy. I would.

Sad, really sad. Yeah, I would probably remain calm and quiet, go to the kitchen, fix up a nice hot pot of grits, go back back to the bedroom then throw the grits on both of em!

... but seriously, don't do what I said cause you don't want to get arrested, although personally I don't have a problem with it, because I really don't care what happens to skanky cheaters and the nasty people they cheat with. I tell you what, could watch someone fuck up those type of people and I wouldn't do a damn thing to help.

Okay, enough of my caustic rage. I personally would have to dump that cheating sack of shit, and move on with my life. Honestly, the begging would just solidify my conviction that it's over.

You should suck the guy off or get him to blow you at least.

You are a joke!
One day she's going to to leave you and that will be OK... Huh!!

Sounds like a fun thing... nothing wrong with it as long as you both enjoy.

it would've been 100% cool if she had told you before, but that was not right for her to invite someone over, if you two had agreed on an exclusive relationship previously.

If you're fine with it, then it's normal. Keep having fun.

If you're not fine with it, then talk to them about it. If they refuse to acknowledge your feelings, then move on.

She is cheating on you and you are letting her get away with it

No, that would've been the moment I broke up with her, and if she had the audacity to do it in my own house also the moment I started beating the shit out of her.

you punk ass bitch. She's cheating and you've just ok'd it.

Let me guess, she sucks and fucks this guy, you get to watch and jerk off in the corner

She is not your girl anymore. Move on.