Get your cock back out and cum right then and there
From Create Your Own Story
You pull your cock back out and slap it into the palm of your hand, once, twice, three times, giving your cockhead a good squeeze, letting the foreskin ride up over it. You bite your lip to keep from moaning out loud as you reach into your underwear and tug your ballsac. The danger, the idea that Dylan might catch you, is too much to take, and you feel the hot cum start its way up your shaft.
In his room, Dylan touches his finger to the tip of his cock, dabbing it in the trail of precum, and then brings that finger to his lips to taste it.
You imagine what Dylan's precum might taste like, and that's all it takes. You gasp as your cock sputters, shooting cum out on the opposite wall, dribbling on the floor.
No time to catch your breath, you zip back up and run downstairs and right out the door. As you climb into your car, you call Dylan back, making up an excuse about a call you just got from your mom, telling him you have to go.
He tells you it's okay, that he'll catch you later, but it sounds like he's laughing. You wonder, as you pull into the street and head for home, if he's found your cum on that wall.