Magical Fuck

Alanna travels to see the great wizard Arkesh when her village is overrun by goblins. But he has a price for his assistance, and that price is the use of her body for whatever his needs and desires dictate. Once she's held prisoner by his magic, unable to move under her own power, will she be able to withstand his needs and desires? Will she be able to handle feeling helpless and used? Or will she learn to love it?