Cake.

In the blink of an eye you borrow an enormous wedding cake from a nearby market stall. It appears in front of the gypsy, seven layers tall, smothered in vanilla cream icing and dense with jam and sugar, sitting on a huge wooden platter. She glances at you with trepidation.

"Fall into it," you suggest.

She takes a deep breath and walks across to the cake. She spreads her arms out wide, goes up on tiptoes and falls forward into the cake. There's a smattering of applause from the crowd. When she emerges her face is a mask of cream and jam and her breasts, belly and pussy are all sticky with the stuff.

You take a bite of the slice you got yourself. It's delicious. You walk up to the gypsy and rub the slice in her face, smearing it across her lips and cheeks. Then you plant a long, juicy kiss right on her mouth and smirk at her.

"I do," you say.

"I don't! What? How could you even consider-"

You give her a shove and she falls back into the cake, planting her bottom in it. You smile down at her. Didn't even have to use your powers for that one. Now that she's all covered in cake, what else could you have her do?