Well he kept looking at Montague, that's for sure. Not in a gooey way, just sort of constantly checking in with eye contact and such. Montague seems to encourage or reward it. Gives him a little pat or whatever. They weren't hiding it in front of their mates.

Montague asks everyone loads of questions, then sits back and lets everyone else talk while he listens. Finnigan doesn't talk much, though - he listens like Montague does.