I don't know if this is the right place to post this but I need help in a situation that I got my son and myself into.

My son and I lived in a three bedroom home alone and our lease ended October 31. My cousin asked us to move in to her three bedroom apartment till her lease is up that way we can get a four maybe five bedroom home together and save money. She has three kids 18, 16 and 13 the two younger ones are here every other week. She has my son sharing a room with the 18yr old and me with her. I don't feel that she sleeps comfortable with me in her room so I've been sleeping on the couch. Now with that all that being said the rent is $785. How does this get split between everyone? Is this split between the three adults or split towards six people with me having a room for me and son?

I know this is a weird situation but I'm already in it and need to not get suckered out of money. I already payed 400 last month and feel that's too much for a place I don't have a room and the only thing I own in the place is the tv.