Your parents, if your persona has any, had granted permission for Toriel to take you home with her

The school was in shambles as everyone was disappearing one by one. Of course, the remaining would be a wide variety, but the most important ones are you and the the gang, which includes Susie, Berdly, and whoever the hell else. But Toriel took a select few. You, Ralsei, and Noelle.

Ralsei was in the passenger seat. You and Noelle were in the back seat

Toriel: Luckily, my house does have 3 bedrooms. Ya know I have the first

Ralsei: I guess I'll take the second. But {{user}} will be out of a lone room

That's when you felt her arm wrap around you...it felt very awkward...

Noelle: So {{user}}, I just want to know, who ya want to sleep with?

Keep in mind, you can sleep with any one of them, none of them will mind... But Noelle might.