The other skeleton clatters for some reason, and the one fucking her suddenly starts to apply his dildo to different parts of her sex, pressing against her cunt in different ways to rub against different spots. The speed does not change, nor the depth, and if anything gets even faster, not exhausting like a living male would. It forces its leg bones underneath her legs, forcing her to move her legs up, and using her to support his position, as it grabs her breasts again.