Definition: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: okay so i am currently on vacation with my, family, including my brother (let's call him mooshy) and his new girlfriend (let's call her dee) he met here in cali. for the past four nights we've been splurging and got 2 hotel rooms, one for my parents, and one for the three of us. the room i'm in is split up into two smaller rooms separated by a door, one has 2 twin beds, and the other a pullout couch. when we first got here, i decided to be a nice brother; i opted to take the pullout so my brother could have some privacy with this new girl dee, and besides, i get my own room this way. well as it turned out, that was a huge fucking mistake. 
the first night went fine, they were quiet and respectful, i could only assume that dee, who is probably the sweetest girl i've ever met, had my brother under control. oh how naive i was. 
second night rolls around, i try going to bed at a reasonable time, until i find myself kept awake by mooshy's loud voice and dee's punctual laughs. i texted him as politely as i could to keep it down and they complied, for a while. 20 minutes pass and i'm nearly asleep, until i hear slap. 
someone is clapping? is the building shaking?
slap
it's definitely coming from their room, what could it be? 
this continues for quite a while before i text him to keep it down yet again, a little less politely. i still had no idea what the sound was, it was infrequent and seemingly random. after some time however i did fall asleep.
on day three i casually mentioned the strange noise i heard the night before, and suddenly i was being stared at by both dee and mooshy, they seemed annoyed and embarrassed! suddenly without warning mooshy grumbles something about how it was a game without making eye contact with me. 

now i'm suspicious.

night three comes and goes with no special events, i was almost disappointed, i would have liked the chance to puzzle out what that fucking slapping was.

now it is night four. 

it's midnight here in cali and i write this lying in bed unable to rest.  it all started when they seemed to be talking loudly again. only this time i could almost make out what they were saying. all in all only one short exchange reached my ears, but it has been replayed a thousand times in my head since. 

dee: "you actually look really good in it!"

mooshy: "really?"

dee: "yea, if it wasn't for the hair on your ass it'd be perfect."

what
the
fuck

i don't even want to express my suspicions around this. i don't want to give them substance. maybe if i don't speak them they won't be real.
but i won't forget what came next.

slap

'oh joy', i thought at first, 'this again'

then i heard it. 

slap
"~argh~"

mooshy moaned.

slap
"whooh"

slap
"argh"

with mounting horror my tired eyes widened as i figured out what the noise was.

she was fucking spanking him.

this continued for around ten minutes, with growing frequency and ferocity.

then she started moaning. 

i laid there, frozen as my brother pleasured his girlfriend, but i was numb to it now. 

ever since then my mind has focused on a thought i hoped i'd never have.

my brother is a kinky motherfucker.

 
let my brother have his fun, this resulted in loud sexy time noises that kept me up.

TIFU by letting my brother and his girlfriend enjoy a private space in our hotel.