He is in luck that she is wearing a dress, and that the skirt hugs her curves all the way down to her knees. If she were in a different skirt, or even a pair of trousers, she would have jumped on him and wrapped her legs around his waist the moment he picked her up. As it was, she just expressed her pleasure at the turn of events with a greedy nip of his bottom lip as soon as she's pulled up to level with him.

"You two!" comes the sudden voice from a bit away, interrupting this moment of bliss. "Stop playing hooky and get back inside! And Mr Weasley, please see that your sister stop trying spike the punch before I have to expell her."