He meets her look-for-look. If directly pressed and unable to avoid answering, Altaïr would admit that he likes Hilda. That doesn't mean he's going to act as though her behavior during this encounter is anything other than what it is.

"The diving is easy," he says, having followed her over to the cliff. Just to make sure she doesn't do something extremely foolish. "Landing is harder. From the right height, even something soft won't do anything to cushion your landing if you fall wrong."

Which means, he realizes, that he will indeed have to instruct her. He sighs.

"Have you even dived before? From a lower height."