So my wife’s twin sister moved in with us 6 months ago after leaving her husband. Initially, it was weird because they’re identical, but my wife’s sister (I’ll refer to her as Jenny) tried to make it easier for me to tell them apart by wearing a red ribbon on her hair but sometimes they mess around dress alike and be silly.
So we were having drinks at home and all of us got super drunk and both my wife and her sister did not have a ribbon on her head and things started getting confused.
I went to the toilet and came back and noticed that the twin sister is gone from her seat. I assumed that she had gone to sleep.
I sat with my “wife” on the couch and we started making out and we did it in the living room. After we were done I went back to my room and I was horrified. I saw my wife sleeping on the bed and that means that I did it with the twin sister.
I got sober immediately but the mental stress made me so tired I went to sleep.
The next morning, I woke up and everything was normal. My wife’s twin sister put on the ribbon and look at me and place a finger over her lips.
While my wife was washing the plates she came to my ear and whispered: “This is our secret and it’s one off”.
I was confused, excited and afraid at the same time. I whisper back “How bout next time with the both of you”. She pushed my head and said, “dream on”.
It’s an honest mistake, I did not know and I was too drunk to tell. The fault is with my wife’s sister right?
What should I do? Should I tell my wife about it?