Does She Still Think About Them

I get turned on thinking about my wife’s sexual past.
She had three guys fuck her by the time she was 15.
Pregnant at 16, separated after 6 years of marriage.
Then 12 more guys before I met her.
Including a threesome with two teenagers one aged 16 and the other 17 when she was 24.
I wanted to know everything and she told me most of it.
Then I started try to get her to pretend that I was one of her many previous lovers as I fucked her.
She wouldn’t do it to start with, but the harder I fucked her she finally gave in.
Problem is that she picked the 16 year old as the one I had to be!
But I was suprised how much she got into it.
It was like he was really fucking her not me 
She said fuck me harder… calling his name out, not in roll play but really meaning it!
How can a now mature woman still think about having sex with a boy?
Do you think that he must have been good in bed?
And was she too old for him all those years ago?