In part 3 John agreed to let his friend, Paul, act out what his wife, Carol, did with her long term lover, William, in a hotel bedroom. William was the father of Carol's past boyfriend Reggie. Her boyfriend was not aware of her cheating on him and his father making his son a cuckold. However he may have suspected that Carol was being a "slut" with his father.
John had agreed with Paul that it was William who was the real issue. Carol had been a high class prostitute and had slept with over 30 men, including John as one of her clients. John was happy about Carol's sexual past. Carol was happy about his use of prostitutes. Past sexual practices were not really an issue for either John or Carol. It was just Carol having had sex with William that had destabilised John and now threatened their marriage.
Following John's agreement with Paul and Carol he then kissed his wife, who replied in kind. Paul got ready to play William once more. He could break character by saying "Doncaster". If the role play got too much either John or Carol could say "Inverness".
John had agreed to Carol and Paul being nude. Both John and Paul were naturists and that nudity wasn't a real concern. Carol did open air gang bangs in the nude with voyeurs watching. Being nude in a soft core situation wasn't a problem for her.
She would use a dildo (instead of Paul's manhood) to replicate the use she made of William's willy. This was small beer in relation to her previous professional duties.
VIAGRA
Carol said "You must understand that William has to take Viagra to get and sustain his boner. That means I have to adapt my technique. It also means that sometimes he can't get a firm erection. Sex with William is not very spontaneous.
In his younger days he could be ready to penetrate me in a few minutes. And he could fuck me on demand. Now we have to plan everything. He has to adjust his other medication, so sex has to wait for his blood adjusting.
And he gets severe side effects. One time he threw up on me as he thrust his prick inside me. He always gets a headache.
John asked his wife "And you still love him, despite his penile inconsistency?"
Carol said "Yes I do. Even when he vomited over me. Sex is only 10% of any serious long term relationship. William is as good as you are at the 90%. But I repeat. I am not going to have him sexually any more."
Carol then got a lap top. She spent some time finding the app and the specific information she needed. Then she took "William" (aka Paul) by the hand. She kissed him hungrily and with her tongue explored his mouth.
John was about to find out what Carol did, and why she needed a computer.
Carol said to "William", who was recovering from being kissed passionately, "I want your body."