Traducción:¿Dormimos en tu cama o en mi cama?
En inglés colocamos las cosas "on" la cama:
He put the bedsheets on the bed.
There are too many pillows on the bed.
The dog jumped up on the bed and woke me this morning.
Pero usualmente dormimos "in" la cama:
Who's that sleeping in my bed?
She's been lying in bed all day.
You better get in bed before your father gets home or he'll be angry.
I can't wait to get home and get into bed.