It's not his face that gives him away. It's the way she slides a knee between his and feels his interest against her thigh, and she smiles.

"It's not something that made the cut, no," she has to admit. "But I know my way around a good, hard pegging."

Which isn't exactly helping her initial misunderstanding, but the interest is genuine so she's happy to go with it for the time being, and she rolls her hips so her body slides against Jacob's.

"That what you want? Rocking up into one, back onto the other, don't care which way it goes?" Her dark eyes tick to find Astarion's over Jacob's shoulder where she has her head tipped. "And you? Sharing for a night?"