The devil on the left

Zack stood before the door to the lakeview bedroom where his sister had staked out a place with Hannah and Heather, his hand hovering in front of the door, ready to knock. The rhythmic slapping of skin on skin and the sound of female moans left him paralyzed with indecision. Were Hannah and Heather in there actually having sex together?

He might never get another chance to see Hannah nude. Did he dare?

The thought of his old-time crush, the upper-grades cheerleader that he'd fantasized about so often, actually doing it, well. His cock hardened in his swimming trunks, straining at the nylon mesh liner.

Just a peek, to be sure.

His hand lowered to the doorknob, turning, pushing.

Just a quick look.

All three girls were on the double bed. Hannah knelt, holding Taylor's ankles up high with her hands. A black-strapped leather harness held a black dildo that plunged in and out of Taylor's body. The direct view was hidden by Heather's brown hair, trailing down over Taylor's crotch. Heather's head moved with little nods, licking Taylor's clit as Hannah fucked hard into her best friend. Heather was crouched above Taylor, head to tail, Heather's knees straddling Taylor's chest. Taylor's fingers squeezed tightly onto Heather's buttocks. Taylor's head bent up off the bed, her mouth in Heather's pussy. Heather's hips quivered as the older girl gave her a wicked tongue-lashing.

Zack froze in the doorway, his heart thudding hard in his chest, not daring to breathe.

Taylor threw her head back from Heather's pussy. Her face was flushed red. She cried out, "YES, YES, YES, AHHHHH!" She tensed with the first spasm of a big orgasm. Her toes curled tight with a 'snap-snap!'. Zack felt a throb, a pulse and a spurt inside his swimming trunks. He was released from his spell. Zack unfroze, sucking in air, and gently pulled the door closed.

A dark, slippery patch spread across the front of Zack's swimming trunks and a warm thread of liquid ran down his leg.