Four years went by. In that time, you and Cathy had really gotten to a good point in your relationship. Sure, you weren't at each other daily anymore - but still 4-5 times a week. Probably more reasonable, to be fair. But in four years, you had learnt quite a few tricks and Cathy was more than willing to experiment - You still remember the first time she had bough sexy lingerie to wear for you. So the quality had gone up. Something you at first didn't think was possible - your then lack of experience showing. Both Lucas and Mariah had moved out and David, well, David was off to college. So at the house it was only you, Cathy and your son Brad. You truly saw Brad as your son. Brad was only 4 at the point of the experiment, so he has forgotten more or less all about it. It made thinks easier at home. If he ever saw you kissing he just thought mommy was giving daddy the cooties. Both you and Cathy figured there was no point in telling him either. Even when he got older.
The biggest upside with only Brad in the house had obviously been that having sex was no longer something you did in secret. Whenever Brad was asleep or at a friends house, you could have sex all over the house.
Now you and Cathy was sitting in the living room. You had just gotten a call from Dr Larry. He told you he could reverse the process. If you wanted to. "Of course I won't swap bodies with David" you had said. "I love my life and I don't want to steal his" you added. Cathy had told you "Well, it WAS your life. Even though I've really liked this Steve. If I had a say I'd say you should stay, with me. But we should talk with David first."
You invited David over. He'd come over that weekend so you could discuss things. He was going to bring his college girlfriend. He had broken up with Molly soon after he turned 18. Pumped and dumped you figured. David wanted to spread his seed. He'd gotten taller in the last four years and with that more attention from girls - so for a while he seemed to have a new young girl every week. Turned out a 40 year old man with a 18 something body could wreak some havoc after all. But this girl he'd been with for probably a year or more. Since he was 19. her name was Lily and she was a real looker. Skinny, big breasts and an amazing ass. You think she used fillers for her lips because they were incredibly plump. You had only meet her twice before, when visiting David at College. Cathy was still the sexiest woman in the world in your eyes. You did prefer the mature form of a woman. And her ass was larger. You really enjoyed a large ass. But you did remember thinking about Lily once, when masturbating. Cathy had been away and you got really horny. You thought about how her young body would feel. If you swapped back, that could become a reality. But you'd lose Cathy. The woman you loved. Besides, you'd be with Lily inside David's body. In your fantasy it was your big dick fucking her. Not your sons. the thought of using his cock to fuck someone was disgusting. Even if that was your original body. You had been Steve, in both body and mind, for probably 3 and a half years now. So, to you, David was truly your son and that was not your body. You were now even more sure about what you wanted to do. Stay in your body, with your life and your wife. You looked at Cathy. Your beautiful, sexy, loving wife. You glanced at her ass - Yup, that ass was the best ass out there. No contest. You didn't want to give up cramming your dick in between those cheeks.
The weekend came and David and Lily got to your place around noon. You discussed things with David in private. He felt more or less exactly the same way you did. He was David. You and Cathy was his parents. He knew you'd been having sex he told you. He wasn't mad, He was happy for me. For finding love. With that, you called Dr Larry and told him what you had decided. He wasn't surprised. All data pointed towards this conclusion he said.
That night, David and Lily stayed over. You could hear Lily moaning from David's old boy room. They were clearly having sex. Hearing your son having sex should have made you limp - but Cathy said she was jealous of Lily getting that kind of attention. And to drown out her moans, what better way then moaning yourself?
"I love you" you kept moaning as you pumped Cathy's tight pussy. "I love you" she replied. "And that big dick". That night was amazing. Knowing that there was no going back to how things had been. That the last four years was now the status quo.