My Wife Is Incredible, Still As Sexual As She Was In College

If you saw my wife in public you would probably not even give her a second look, I am not trying to be mean or anything she just dresses very plain and rarely wears any make up. Matter of fact most days she wears sweats, a t-shirt and some kind of pullover because according to her at fifty eight years old she just wants to be comfortable.
Then there is the sexual side of her, the woman who while we were on a two month stay in Florida looking at retirement properties wanted me to put her in bondage, blindfolded and all of her available for a few friends I had met while golfing a few times a week. She loves being submissive sexually but has a very bold and outspoken personality otherwise.
One of the most exciting things she loves to do is be put into bondage and sexually played with, tickling her will cause her to not even be able to talk in complete sentences let alone breathe good but she loves it done to her. She loves not knowing how long or how many orgasms she is going get and give to me or another guy, she loves all of it and has come up with some great scenarios for her to be vulnerable and played around with sometimes for hours.
This all started about two years into our marriage, one evening out of thin air she just asked if I wanted to tie her up and play with her, even started referring to herself as Herb's Toy. She would tell me at random times in the week that she was going to have our kids spend the night at her mothers then end with telling me Herb's Toy needs to be played around with or something similar. Thru the years our play as been as mild as her just having her wrists secured behind her back to complete suspension barely able to move for a few hours having multiple orgasms shaking her body. I bet I could get up after typing this story and go tie her up to be played around with and she would love it.