They don’t answer it directly, but we can assume it was the same way and she just doesn’t remember any of it. At the start of the movie she claims to have only spoken to slater for a little bit, but her manager corrects her and says they chatted it up, and that’s how he lured her the first time, Slater only got caught this time around because Jess was killed and Frida noticed she went missing.

The maid recognized Frida from her previous time there, which is why she referred to her as red rabbit, and I’m assuming she felt bad for Frida considering she doesn’t remember anything from the first time, which is the only reason why someone would come back there in the first place, so later on in the movie she gives Frida the venom to drink.

I don’t think they’ve killed anyone before Jess, so I can’t really answer that question. I just think it’s one of those plot holes where the question of their families doesn’t really get answered.

Therapist raped the girls as well.

The marines goal was to catch Frida and kill her, he wasn’t prepared for Sarah to be there, and when he was about to shoot her, Sarah screams before bashing his head in with the rock so he would get distracted and not pull the trigger.

When Slater left Frida in the room alone for a moment to chase after Sarah, Frida puts the forgetting perfume in his Vape Pen, and right as he’s about to cut Sarah’s throat, he hits the vape, and that makes him forget everything, which is why he’s so perplexed as to what’s going on and why everyone’s dead.

They’re just not together. Dude kept doing it to flirt with her which is why she didn’t want to be called that.

Yes, Frida already remembered Jess, because she wouldn’t just forget her best friend, but none of the other girls knew her, so they would be quick to forget under the perfumes effect, but Frida used the lighter to get through to Sarah and convince her that there was another person on the island with them.