It's not much later, in Isabella's room, that she asks:
"So... is Alex really a dom?"
...does he have instructions about having to stop this kind of thing from happening?
And is there a librarian nearby who's very likely to take offense at their presence?
Are they far enough away that he can afford to give the couple some time for themselves and intervene when it looks like a librarian might come around and decide he wasn't doing his job right?
Mmk maybe he should stop that. He taps the window with his knuckles and makes a 'cut it!' gesture with his hand, trying to signal the librarian's position with his eyes.
And when he has some downtime he'll check out the movie's scheduled showings.
Perfect! So at lunch he'll see if he can find Jackson in the cafeteria.
Then he'll talk to Jackson first. If he catches Isabella's eye, he'll try to gesture and mouth a 'be there in a sec' or some such.