My wife is my neighbor's casual sex partner. (NACT-087)

My wife, Rinne, and I were supposed to be an enviable, loving couple. One day, I finished work early and came home feeling a bit cheated, only to find a pair of unfamiliar men's shoes in the entryway. With a sense of foreboding, I peeked into the living room, where my wife, with an expression I'd never seen before, greedily devoured the neighbor's penis… Although I wanted to look away, my legs felt glued to the ground; anger, the shock of betrayal, and an inexplicable restlessness swirled deep within my chest. Even more, on my wife's phone, there was a video of Rinne obediently offering herself to the neighbor, following his orders. Realizing I couldn't tear my eyes away from the screen, in a state of self-loathing mixed with excitement, I lied, saying I'd be working late today, and decided to investigate—