You head down the stairs to the shop and flip the light switch, lighting up the shop filled to the brim the aisles of costumes. You browse through the rows of costumes at your uncle’s behest admiring the detail of each one, ranging from everything to lizard-men with green, scaled skin real to the touch, to furry, snarling werewolves with hair that felt like it came straight off your dog, to even More human designs like a lumberjack outfit, complete with flannel, suspenders and thick curly red beard. You keep browsing until a pastel yellow, plastic package catches your eye from behind the counter. You wander over to the package and hold it to the light, “Beast Briefs!” exclaims the grey cartoon wolf on the plastic, it’s a pack of diapers... it’s one of your uncle’s fetish items. You break out into a cold sweat, curiosity setting in, your cock tenting up in your pants, you glance at the stairs making sure he’s not coming down. “There’s a couple missing, he won’t notice if I take one,” you reason to yourself. You quickly take a diaper and take it to the changing room, stripping naked without a second thought and sliding the garment up your legs, over your throbbing erection and admire yourself in the mirror, you’ve always loved wearing diapers but that’s something you’ve had to keep secret. You start jerking off, taking advantage off the chance, you moan loudly, the pleasure far more intense than any masturbation you’ve done before. Suddenly you feel a sharp pain in your stomach and fall to your knees, you feel hot, sweat pouring down your face, pressure building up too fast to stop, you release a huge torrent of shit into the diaper and it feels amazing,. The shit keeps coming and you moan loudly in pleasure unable to help yourself, you cum into your shitty diaper. You try to catch your breath but you have no time until you release another load of thick turds into your already full diaper, you can’t stop! You desperately try to grab the edges of the diaper and they don’t budge, it’s not coming off.