It wasn't exactly the weightlifting routine we had in mind, but Mom gave the two of us one hell of a workout. I was surprised when she mounted him. Dad spread her cheeks and he nodded to me. Was he encouraging me to f**k her ass while he filled her p***y? I c****d my head questioningly, and he nodded his head vigorously. I was a little hesitant, but eased the tip of my c**k into her asshole. "Oh God!" she groaned. Her ass was far too tight, and not the least bit lubricated. I pressed just the tip into her sphincter and held still while dad pounded his c**k up into her drenched p***y. I was astonished to see how turned on my dad was. They both came within minutes, and it was amazing to watch. I showered alone after that and then joined them for a late supper. As was our custom by then, we

