"Oh, I see..." Her tone makes it perfectly clear that she doesn't and Pippa is rather relieved to have her hands back to herself.

"I--" Nervous laughter is the best she can do at this point, maybe he's making a joke about this...please let it be a joke and there is some rational explanation for her hand that will be forthcoming. "No, I don't think I'd tell people that either, to be honest."

Pippa hasn't a clue what a púca is but he's throwing around words like faeries and otherfolk so she's imagining an over-grown Tinkerbell of sorts and coming to the conclusion that she shouldn't have offered him alcohol. He's obviously already high.