Yes, but she has only 5 minutes to reach the orgasm

I decided to give her a special treat that I had been saving, without her knowing it, for her final night in my ownership. She was lying upright on the bed with her legs still spread from fucking, when I said "As a reward for your years of mainly good service, I'm gonna give you a special treat. You may make yourself cum."

She couldn't believe her ears, but looking at me and deciding I actually meant it, she tentatively put her hand between her legs and began to masturbate. I hadn't let herself touch herself in the entire time we had been together, and this must have felt like finally scratching the greatest itch in the world for her. I said "You have five minutes starting now to make yourself cum, for your first time in a long time and your last time ever. After five minutes your cuffs go on and you won't get a second chance in your life." Hearing this she began to wank herself with desperation, spreading her legs wider and higher and shamelessly ramming her hand up and down her clit and in and out of herself, her head back and her eyes rolling into her head, half in pleasure half in terror, knowing this was her last chance to ever feel a womanly orgasm before a sad pleasureless life. To make it harder for her to finish in time I lay beside her and cruelly pinched both her nipples, twisting, pulling, and pinching between my nails.