Is it common to joke about having sexual relations with your brother?

My 30M girlfriend 24F of one year has hinted jokingly about sleeping with her brother in 4 or 5 occasions. The last time it was very explicit, she was organising a party and told me that I may not want to be there since she was going to be drunk with her brother and told me that when they're drunk stuff happens. I asked what the hell she was saying to me and she just dismissed it as a bad joke. Since then she didn't joke about it anymore but it kinda stuck in my head Am I overthinking about it? Is it just a bit weird? I dont recall anyone that I ever met making this kind of jokes

TLDR My gf jokes about having sex with her brother and it makes me paranoid

Submitted December 13, 2022 at 05:18AM by TeoBB https://ift.tt/woCSfM5