I am located in the north of Germany. We had an event where the whole company got together, about 200 people. We had dinner, a live band, all in all it was a great evening. My small department (about 15 people) rented a small bus so we could go to this event together.
When we drove home, my place was the closest so they dropped me off first. In front of our house we see this person peeing in the shadow. Illuminated by the car's headlights I recognize the person. It was my son (27, he still has a key and visits on weekends). You could clearly see that he was drunk, as he could barely stand up and walk straight. All of the people in the bus started laughing. To make things worse, he recognized me and called me, making sure everyone realized it was my son. I was absolutely mortified.
It was literally a few feet away from our house, he could have just gone in and taken a piss inside where it's warm instead of watering the plants in the middle of winter for crying out loud.
Now, I'm scared to go to work on Monday because I'm sure the whole company is going to know about it by then (the only thing my department does outside of work is gossip).
I'm scared of all the patronizing smiles undermining the little bit of authority I have in this company (managing this small team).
I don't know what to do. How should I react when someone brings it up during work or in the breaks? How should I react to jokes about that? I know I can't undo what has been done, and I know actively trying to silence this is only going to lead to a Streisand-effect, but I don't want it to affect my workplace.
Leaving the company is not an option for me because of various reasons I cannot and don't want to go into, so please don't ask about it and please don't tell me to just "brush up my résumé".
Edit 1: Regarding responding with humor, I agree with Mike's comment:
Forcing herself to joke about something that clearly bothers her could easily backfire. What if one of the people that doesn't like her responds with a better and meaner joke? Will she always have a good one to come back with? A little too risky, in my opinion.
NEVER, EVER "answer with humour". It comes across as incredibly fake, nervous and weak. Nothing is more humiliating than "trying to make a joke".
I don't really want to answer with humor in this case, as it would most probably look like I'm trying too hard and it would still be visible that it bothers me.