Brook was enjoying her lolly and it inspired her to come up with a game to play with you. It's a simple game. She'll let you jerk off to her but she's going to ration your strokes. You'll only be allowed to stroke once for every time she licks her lolly. If she licks it 5 times, you get 5 strokes. Every time she sucks it, you get to edge your cock.