Lately, he had always been spending the night sleeping in the same bed with her in this room. Although strictly speaking they did nothing at all the whole night, as time went on, it had become a habit for both of them to fall asleep together without them even realizing it.
Because she had to keep the lights on while sleeping, Serenity would gently hint, "I always need the light to be on when I'm sleeping and you're probably not used to it. Why don't you just go sleep in your own room instead?"