You return the next day

Ella looked exhausted. That wasn't a surprise, given her ordeal, but it was a bit of a disappointment. Still, you had a solution. "Perk up," you order.
Instantly, Ella looks ready to run a marathon. "Just let me go," she says as she finally stops masturbating. "I'll give you anything you want."
"Really," you say. "Tell me some of the things you'd give me if I let you go."
"Money, jewels. A blowjob."
"Wow," you say, pulling down your pants. "That sounds great. But here's the thing. I can get any of those things from you right now. Give me the best blowjob of my life."
You've had a lot of blowjobs in your life, but this, this was eight minutes of pure ecstasy. You cum in her mouth.
"Hold it there," you order. "Masturbate to the taste. You can cum when you decide you like it."
It doesn't take her long at all. The slut.
"Tell the truth," you say. "Am I the best man you've ever fucked?"