It gets worse at night. The books are vague about why and Corvina is not, and neither of them says the reason out loud.

At two in the morning Malfoid puts out the candle in her own room and knocks on the next door along.

MalfoidI am going to be extremely badly behaved about this and I would like you to not be gracious about it.

CorvinaGet in. Leave the door open. It is a procedure.