A hot spring trip for the neighborhood association. The open-air bath was mixed, so I was left alone with my wife. From the moment I laid eyes on her naked big tits, my erection wouldn't subside, and under the pretense of washing her, my naughty wife started stroking my dick. We embraced in the empty open-air bath, and when my dick was buried in her big tits and sucked, I couldn't bear it any longer, so we started having sex right there. The excitement of not knowing if someone might come doubled, and I made the married woman cum over and over again with my hard pistons in the bath and in the wash area.