My mother-in-law won a grand prize in the shopping street lottery, which was a hot spring trip... 'Isn't that amazing, Mom?' I said with a laugh. But apparently, the prize was for 'three guests'... So, it turned out we would be going on a hot spring trip over the weekend, just my wife, her mother, and me. In what they call a family bath, a time-limited private bath, my wife, her mother, and I ended up in a naked mixed bathing situation, and to my surprise, I got an erection...
