In the steamy hot spring, four couples were playing a thrilling wife-swapping game in the open-air bath. I was embracing the stunning married woman next door, who wore a soaking wet white bathrobe, her large breasts barely concealed beneath the fabric. Her husband was pounding into my wife by the poolside, their moans echoing in the mist. I ripped open her sash, my fingers probing her already soaking wet vulva. She bit her lip and cried out, "Don't stop...come in!" I thrust my hard penis in from behind, water splashing as I pumped, the sounds of flesh colliding mingling with gasps. She twisted her waist to meet my thrusts, squeezing my penis tightly during her orgasm, the hot semen filling her vagina. On the other side, two other couples were also locked in a frenzy, breasts swaying, vaginal fluids dripping, the entire hot spring a scene of wanton debauchery.