"I pride myself on it," she teases in return even though it's absolutely true. Then Astarion is proposing that, and Jacob is accepting, and she's quick to act on it.
She braces her hands against Jacob's hips, pressing him back into Astarion on the other side of him as she licks, and lips, and even sucks here and there her way down his body. Her hands slide around the curve of his ass as she does, kneading into the muscle there, mouthing a hot, moist trail along the front of his hip.