AIO for being overwhelmed by twerking

I just moved to a new city and made friends with a woman named Yulia who is really kind and funny. This weekend she invited me to go dancing with her friend group, it was initially really fun as they showed me the local 2 step type line dance and were telling me all the fun things to explore in the city. I was hitting it off particularly with Bianca who works in a similar field as me.

At a certain point the DJ started playing booty music and everyone started to twerk and grind on each other. I don’t know how to do this and was really uncomfortable with a dance that involved people touching my body. Bianca started to grind on me and I got really overwhelmed and said “this dance is too much for me, I will dance alone tonight”. She kept going so I left to sit on the couch as I was too overwhelmed. She came over to me and basically started to lap dance me, and said with “when someone throws ass it’s a crime not to catch it”. And I was like woah, I’m a bit shy because in my hometown we dance further apart, please get off. She did, but I felt very violated so I left early.

I know Bianca was trying to include me, but it was really upsetting that she didn’t respect my bodily autonomy and I feel like she should apologize to me and promise to not do it again. But I’m new to the group so I can’t tell if i’m overreacting or this is just normal club stuff?