Daily Sketch [12/27] Maddie Makes It Big (Patreon)

Maddie's been drawn into a debate with her friends about how good she is (or isn't) at controlling her erections. She think's she's got herself under control because she can keep her stiffy down in class, but her friends never let her live down the few times she popped a big one during volleyball practice. So Maddie wants to settle the score by proving her prowess. Gathering her friends behind the bleachers, Maddie unzips and lets her massive member flop out. Then she gets herself hard without a single stroke, swelling to full size right before their eyes.