No car no sex

Haven’t been able to have sex with my boyfriend anywhere besides his car (just a handful of positions available) and it really doesn’t help how sexual we are, I still live at home and so does he and neither of us is ready to move out and idk what to do. W scant do a hotel cause his mom tracks where he is it’s honestly ridiculous.

Any advice ?

We are both 19 and his mother is super harsh and I share a room with my sister.

And when I say she’s harsh I mean like each of his paychecks have to go through her. Like he can’t do anything unless she wants it. And I mean he pays rent ... doesn’t that count as anything.

He pays his own everything.