I asked Jim if there was any place the girls were not allowed to go. He mentioned just the basement of the building. The girls were not allowed down t...ere because there were too many safety hazards down there. I told Jim to come with me and we went into the basement. I was intimately familiar with the plans for the building and knew every nook and cranny of the whole building.When we got to the basement I noticed a cement block wall that was not on the plans for the building.I asked, "Jim what. However, He felt very comfortable when his mother's big breasts smashed into his back. Cathy extended her arms and grabbed her husband's behind. She began to fuck her son's ass. Kevin and Cathy had their k**s uniquely sandwiched between them in this special position. While Kevin was fucking his daughter's ass with his cock at one end, his wife was fucking her son's ass with her fake cock from the other end and in between them David had his cock buried all the way into his sister's pussy. "Mom,. “We should put some music on,” she said as she went to her phone and opened a music app. A hip-hop song came on and she started dancing. “Hey! Remember this?” she said as she shook her ass against him.“How could I forget,” he said. “You know you have the best ass. I mean, like, dayum!”Tory giggled as she pushed against him, “You can spank it, you know.”Chris didn’t have to be told twice as he laid two whacks across each cheek and watched her ass jiggle. “You like that, huh?”“Yeah, makes me. Plus - not to put too fine a point on it - I wanted to keep invading their privacy so I could judge their emotional reactions to the changes I was introducing to their lives, especially to know if I was going too fast for any of them, and what Carol's evolving feelings for me were.Dad and Donna were impressed by my demonstration, and had some questions about it.I answered them, but with unsatisfactory answers, not being able to tell them how I could do it, and not agreeing to teach it to them.