My boyfriend’s brother asked me to watch his son for 10 minutes and said him and his fiancé needed a talk. They have the upper level of his dads house. I had a horrible head cold and they both knew it. However I said yes because I was trying to be nice. Their son is 2 and is suspected of having autism (I say suspected because his brother doesn’t want to know if he had autism because he has a thing against people who need therapy) so he can be a little tricky to handle. Somehow, 10 minutes turned to an hour, and it hit 2 AM. At that point their son grabbed my hand and led me upstairs, was rubbing his eyes like crazy, and was obviously exhausted. When they let him in, it was obvious they were having sex 🤦🏼‍♀️. I’m really annoyed. How should I handle it