Is it normal that i slept with her sister?

"how do I go about telling her and still keep our marriage?"

and this is why it's a bad idea to cheat in the first place
cos then you have to try to figure out to um... unfuck... the situation

How do you accidentally sleep with someone? What did you slip on a banana peel and fall on top of her or something?

Dude ur a manhorr

Keep your mouth shut for everyone's sake.

shhhhhhhhhhhh shut up. don't tell because it make you feel betterwhile devestating your wife. you and sis inlaw say nothing it never happened

Things have a way of coming back to bite you in the arse.

You should have told her right away now look at what has happened.

NOTE: YOU CAN'T ACCIDENTALLY PUT YOUR PENIS INTO ANOTHER VAGINA, just thought I'd mention that.

"I need to tell my wife before something bad happens"

Grow a pair of fucking balls, you don't need to say shit about anything.

Nope this is not normal.

You and your sister in law are people who are suppose to love and respect your wife. I dont care how drunk you were that is still not an excuse to go and break your wife's trust like that and betray her! This is unforgivable behaviour and I sincerely hope your wife never finds out because this would shatter her world that her husband and her own sister could utterly disrespect her like that. I dont usually judge people but FOR SHAME!! If you are smart an have grown up at all you'd rent her sister a hotel room for her stay!

This was not an accident you slept with her you cheater and did not tell your wife.

"Accidentally slept with her sister?" PMSL!
Cheating is a choice, not an accident!

sister prob doesnt want her to find out either. keep your mouth and your zipper shut.

you're a slut.

You don't. You either tell her OR keep your marriage. Plus if her sister needs another service give it to her.

dont tell her!!!! do u really want to ruin a relationship with that one mistake???? dont be stupid

i know this might be a little off topic but i was dating my best friends cousin few years ago was sort of shy in telling him but we sat had a chat,and eventually he gave me his approval and swore to not tell any of his family (except his mom of course) but shes a nice lady either way but,eventually things happens we make mistakes like my ex she cheated on me and broke up with me but even then her and i stayed friends.

You're a horrible person

OP, my impression is that you don't give a fuck about anyone but yourself. You just want to try to get rid of the guilt you rightfully feel. Unrightfully, you're considering hurting your wife and causing further untold damage to her family.
Keep your mouth shut. Accept that you are slime.

you tink your jakt up look at my posts

Did you fall in her?......penis first?

Sex does not happen accidentally. You need to take responsibility for what you did cuz if u tell your wife that you did it accidentally, then you're in trouble.. her response will not be pretty, i'm telling ya. Just be honest and tell her what happened. Its better that you tell her then that she finds out by someone else. Good luck to you, and try not to get in deep shit again! :)

It's been 2 years. That means she's really good at keeping a juicy secret from her own sister. That's a nice setup.

Was she good? I'd tap that ass again.

How do you accidently sleep with someone?

Were you both jogging naked and you two collapsed into each other and instantly orgasmed?

it could have been her brother ha ha

It was a while ago. I understand it's going to hurt her, but if you're truely sorry and talk to her maybe she can move past it. Ive been cheated on and have cheated and its not easy to fix, but life moves on. Make sure to tell her that it's not her fault or even her sister fault. Tell her it was a mistake and you knew it the second you did it and you've never thought of doing anything like it again. Tell her it doesn't mean you don't love her or want her. You were drunk and horny and dumb. Offer to work through it with her, do whatever is nessicary to keep her.