Invited by my boss to a hot spring party, my wife and I decided to join, tempted by the prospect of a raise and some personal interest. The boss had a notorious reputation with women, but I figured it'd be fine if there were many people. To my dismay, the gathering consisted only of the boss, his mistress, and us—just four people. It felt wrong, but I convinced my wife to stay, and the party began. Things started heating up when the mistress suddenly passed out drunk. Then the boss, heavily intoxicated, began acting wildly, demanding to watch us have sex. I tried to refuse, but to my shock, my wife surprisingly agreed. We ended up having sex right in front of him. Despite the drunken state and the presence of another man, my wife became unexpectedly aggressive—asking the boss to watch up close, and then, as if aroused, started hungrily sucking his cock. In the end, she got fucked by the boss, and I was stunned seeing her moan so passionately, something I'd never experienced with her before. Watching her being taken by him, I felt a shameful yet intense arousal. I don't even remember how many times I came that night, but afterward, our marriage became even more passionate than ever.