Should I leave the group chat?

My bf and I were added to a group chat of about 17 people. We're all going to an upcoming event.

One of the girls in the group is being really innapropiate.

Her conversations are very sexual, talking about how she loves being eaten out and hoping to find a guy to have amazing sex with that night. She and some of the guys are just being nasty and joke about a threesome with her.

She's posting pictures (thirst-traps) of the outfits she wants to wear so we all can help her decide. Mind you, these are very provocative pictures and are obviously a way to get attention. She asks things like "I don't know if this is a flattering shirt since my boobs are so big" and then sends a picture of her cleavage almost popping out.

I'm not worried about my bf, he's the one who pointed out and just silenced his chat, but one of the girls left the group cuz she was annoyed and now the innapropiate girl and some other people are saying she's just insecure and can't handle a confident girl.

I'm really good friends with most of the people and don't want to cause tension before we all go together, I feel like it'll just cause drama and put a damper on the night. Just like it has for the girl who left the group, people are already taking sides and I don't think it'll be much fun for her since she's already thinking about not going after all this he said-she said.

I really want to have fun, the tickets and everything was pretty expensive and I've been waiting for so long that I don't want to ruin it.

I tried ignoring it but then one of my friends called me about not answering to some very important details.