As of v.13 you only get to 1 time and never again if you missed that 1 time you never get to sleep with her.
Just keep working on all open quest and some finished quest actions and keep Lisa and Alice's mood maxed out and Max authority over both maxed out at all times.
I dont mean to have sex with her just to sleep in her room, the game's dialogue (and later kira who says whoever enters the room first sleeps there) seems to indicate that is a regular event.