Tell me to stop

I owe him a debt. The kind money can’t repay.
He wants something else: me, for one year. But I don’t even know who he is… 365 days and nights doing everything he wants…except that. “I’m not going to sleep with you,” I say categorically. He laughs. “I’m going to make you a promise,” his eyes challenge mine. “Before our time is up, you’ll beg me for it.”