"Because in case you've forgotten, I'm your girlfriend. I'm supposed to be sensitive!" Perdita all but yells.

Madam Pince looks up from her desk.

Lily does a bit of rapid calculation.

There are three empty chairs at her table and one at James'.

Either way, they're in all in danger of being abruptly joined by a disgruntled roommate any moment.

Lily sweeps her things into her bag, gets up, and crosses to the empty chair next to James.

"You don't mind, do you?

"Safety in numbers, right?"