Lily had always been close to her grandpa Harold. At 18, she was a petite brunette with curves that turned heads—full breasts straining against her tops, a round ass that swayed when she walked, and a tight pussy she kept shaved smooth. Harold, in his late 60s, was a sturdy man with salt-and-pepper hair, a thick cock that still got hard as steel, and a group of old buddies from his poker nights: Tom, a burly ex-trucker with a beer gut and massive hands; Mike, lean and wiry with a perpetual grin and a long, veined dick; and Bill, the quiet one with a hairy chest and a fat, uncut shaft that leaked precum like a faucet.

It started innocently enough one summer evening at Harold's cabin by the lake. Lily was visiting for the weekend, wearing a skimpy bikini that barely covered her nipples and left her ass cheeks peeking out. The guys were over for their usual barbecue and beers, laughing about old times. Lily flirted shamelessly, bending over to grab a soda from the cooler, giving them all a view of her bikini bottom riding up between her pussy lips.