Suddenly, the door to the bathroom began to creak open. In his rush to the toilet Jake had adsentmindedly forgot to lock the door. It was a single toilet unisex bathroom, meaning Jake had nowhere to hide. Before he could yell that it was occupied, Katie's devious smile crept from behind the open door. Her smile quickly turned into a look of shock, as she saw the much more prominant bulge in Jake's trousers.
"So it works!" she exclaimed, locking the door behind her and walking towards Jake.
"What are you doing here?" Jake asked.
"Well I found this watch of yours next to the bed this morning. At first I thought it was some weird project you had going on, it showed a few different guy's names with their exact dick size, including Josh's and yourself. Thought it was a bit weird to have a catalogue of dick measurements on your smart watch."
Jake blushed, "That's not what it's for."
"Clearly," she purred, eyes fixated back on Jake's bulge. "I took it to work this morning to give it a better look and when I got there it lit up with the name of every guy in my building! I gave it a try on the teenage intern there, lets just say I probably made him the most popular boy in his school," Katie neared closer, "I'm on lunch break right now, so I thought I'd come see how my big man is doing." Jake could feel his new equipment inching down his leg again, but this time it wasn't the watch's doing. "Let's get these tight pants off you," she breathed, gently pushing Jake down onto the closed toilet seat. Jake's hot dick was straining against the fabric on his legs as he frantically began unbuckling his belt. Katie kneeled down and impatiently helped him pull his pants to his ankles, both of them eager to see the monster uncaged. Katie was face to face with the biggest cock she'd ever seen, only inches away from her now salivating mouth.
"Holy shit," she gasped, "I knew it was going to be 12 inches, I set the number on the watch myself but...holy shit," Katie instinctively began lightly running her closed hand along the length of Jake's massive member, "how big is it soft?"
"Looked around 10 inches," Jake muttered through a shakey breath.
"Fuck," she gasped, her mouth inching closer, "you're so, fucking, big," she sighed, plunging her pillowy lips onto Jake's cock. Both of them moaned simultaniously as Jake's dick was lovingly sucked. Katie could only just get the head of it in her mouth, but she made up for it by flicking her tongue around the tip of his erection and running both hands along his length. Jake was in ecstasy. What he previously saw as an inconvenience to his day was now being sucked dry by his size queen of a girlfriend. Jake placed his hand firmly on the top of Katie's head, gripped her hair hard and began to pull her a little further onto his enormous manhood. This caused her to let out another muffled moan, and she began sucking and stroking more enthusiastically. This brought Jake to the brink, and with one large grunt began unloading his seed into Katie's waiting mouth. Her eyes very nearly rolled to the back of her head as an entire foot of cock sprayed semen down the back of her throat. She made sure to swallow every last drop. Jake slumped his posture on the toilet, breathing heavily.
"Shit Katie, that was...that was..."
"Really fucking hot," she said through a grin, "My lunch break's almost over, I suggest we get ourselves presentable and get back to work. Thanks for messing up my hair by the way." Jake chuckled and began buckling his pants back up. Katie finished straightening herself up in the mirror, right before she left, she turned back to Jake, "A guy your size would have a pretty hard time hiding a boner, I hope this bit of fun will be enough to get you through the rest of the day, at least until tonight," with that, she winked, then slipped out through the door, leaving Jake stunned and excited for whatever else Katie had planned.