So this happened about an hour ago and I’m just sitting in at a cafe, trying to stop cringing in embarrassment.

I’m on vacation with my wife and her family and we arrived at the hotel today, checked in and settled into our rooms. A while later a few of us headed out to explore- I went and met up with a friend who lived in the area and ended up having a few drinks.

Earlier while I was out, I had got a text from my wife saying that she was switching our room with her parents’ as ours had a balcony while theirs didn’t, which her dad wanted so he could smoke (and that she was going out for dinner with her mom). Anyway I saw it, said ok fine, agreed to switch keycards with him once I got back.

A few hours later, I was a bit drunk and my friend dropped me back to the hotel. The text had completely slipped my mind and so I headed to the room with the balcony where her parents were staying and, thinking it was ours, went right in.

As I went in, I heard the shower running in the bathroom and, feeling promiscuous, I decided to give who I thought was a my wife in the shower and little surprise. So I stripped down (completely naked) and, seeing that the door was slightly ajar, decided to barge in. So I did. While also announcing quite loudly, “Daddy’s home!”.

The sight that lay before me is one that’ll be stuck in my mind forever- my father-in-law, naked in the shower, looking at in a mixture of disbelief, confusion and- mostly- anger.

I froze, and for a second we just stood there in silence, which was soon broken by him shouting- “What the FUCK (my name)”.

At this point my flight response kicked in and, as fast as I could, rushed out, dressed faster than I ever have before in my life, and ran out the room.

Since I don’t have the keycard for the other room and sure as hell am not going back to ask for it, I’m now sitting at this cafe outside the hotel. I’m waiting for my wife to get back from her dinner as I don’t really think I can explain what just happened over the phone, if I can explain it without dying of embarrassment at all. So yeah, the family brunch tomorrow should be interesting...

TL;DR: Switched hotel rooms with wife’s parents, got drunk, accidentally went into their room, barged into bathroom while FIL was showering

UPDATE: My FIL told my MIL and my wife, and both of them pretty much died of laughter. He also isn’t too upset, just told my wife to tell me I know “who daddy is around here”, who promptly relayed this message to me. Currently with the wife in OUR room, trying to get the aforementioned image out of my mind and avoided the in-laws at all costs. Also would like to clarify I did NOT know what promiscuous actually means, I swear...