I am living in a den of sin

Hello,
My name is Ra.

My mom passed away a few months ago, so I am living with my stepfather.
He always bring girls home, and bring his friends home to take drugs, and having sex parties.
He even invited me to join because I am an adult and I should experience sex.

I know I can find my own place but I am still going to the college, and I dont have financial stability to stay alone.

What should I do? Should I stay for the sake of having a roof over my head?