This is a bit odd at our ages but true.
Once a week or so, my wife and I get into a sex play session and it goes like this. She pretends to be a naughty early teen school girl and I am her Daddy. I have a talk with her about how bad boys are and that only Daddy can do sexy things with her. Other girls, however, are OK to fool around with but she has to tell me in detail what she does with her girlfriends, all outrageous lesbian kinky things, of course. Sometimes she gets a spanking for her naughtiness which further turns us both on quite a bit. Meanwhile she is laying nude, except for pulled down panties, across the bed and masturbating with a foam rubber play ball between her legs. Sometimes she has a panty liner and we discuss her menstrual period and how Daddy can make her cramps feel better. We generally have a running dialog about her new sexual feelings, activities with other girls and doing sexy things with her Daddy. She also gets off on the idea of wetting or soiling the bed during sex, though this never really happens. The term 'Daddy' is an essential part of our age play. Meanwhile, I am straddling her pillow-supported leg with a big jelly dildo up my ass. The thought of this gets her off big time. I am massaging the end of my cock as she masturbates on the ball. Sooner or later one of us comes and the other climaxes shortly afterward. During all this, I may or may not have an erection, depending on whether or not I used some Viagra. When I do, she often strokes Daddy's penis to make it feel good. I must say the old girl, really age 64, has gotten very good at giving a hand job. However, in order for me to come, I need anal petetration and this wonderful incestuous kinky fantasy. We have been doing this for many, many years now. Often, we have her in a diaper and she is scolded about having to be kept in a diaper as a young teen. Of course, she at age 64 and me at age 65, we may both need diapers one of these days! Anyway, this all is true. Don't know if it is printable. It does not involve children nor do we have any interest in children. We just act out this taboo age play fantasy. As we get older, it is the head between your ears that kicks in. Fantasy keeps us going. What a gift from God sex and sexual fantasies are. Enjoy...all ages...enjoy.