Crowley loved this family. The original summoner had sold his soul for love. Crowley always thought that was pathetic, but it had also turned out to be very lucrative for him. Especially this time. The object of the affection turned out to be money hungry. Crowley could respect that much more than a hunger for love. Her younger sister wanted to be thin. Why diet when you could sell your soul. The father made the same request he had—three extra inches under the belt. And the hired help wanted her mother healthy.
As for the oldest daughter, he didn't have to give her anything. She'd be coming to him all on her own.