Tell her you need more or the deal is off.
From Create Your Own Story
"Well this is boring as shit. I can't get off like this. You're going to have to do something else, or the deal is off."
"You sure about that?" She asks. You nod, even as she strokes.
Slowly, she leans in close to you and presses her lips to her ear. "Close your eyes, then," she whispers. Her breath in your ear sends chills down your spine as she speeds her stroking of your cock. You do as your told, and suddenly feel her hand slip down the back of your pants.
"What the fuck are you doing?" you say, trying to shimmy away, but her muscular arms hold you in her grip. Her slender finger sneaks between the cheeks of your ass as your wiggle to get free, and with a forceful push, she's knuckle deep up your ass.
"You wanted more, motherfucker," she says quietly, wiggling her finger deeper inside you as you buck and fight to get free. There's a sharp pain as she moves her finger deeper, and then it's suddenly gone as she presses into something inside you you've never been aware of.
"Holy fuck!" You shout, pleasure welling from beneath your balls as she strokes something deep inside you, and the sensation rises along your cock. "Holy fuck!" You shout again, as your cock twitches, shooting a heavy stream of cum out across the empty air, spattering against the kitchen counter. Your knees buckle as a second string launches from the tip of your erection, and a third, and a fourth, and a fifth, before you actually buckle down to the floor, your weight pulling her hands free of you.
"There," she says. "We're done." She moves around to the kitchen again, using a bottle of water to wash her hands. "Deals a deal, right?"
She leaves quickly, with most of your supplies. You lock up the door and sit alone in your apartment for days, until your food and water run out. You scavenge what you can from nearby apartments, but after a month, the outside world is too dangerous, and your lack of food and water makes you weaker and weaker. Two months after you successfully negotiated that handjob, you die alone, starved, dehydrated, and afraid of the outside world.
But at least you got that one last go, right?
THE END.
