Willow

Willow realized her dad might not approve of her girlfriend being a literal cavewoman, so she had to sneak her and Ugga into the house through the window.

John, of course, knew Willow was trying to be sneaky, but he would let her think she got away with something. He planned on checking in on all his daughters when they got home, and have them try to hide their girlfriends when he went to their rooms.