Marginally involved you say Sailor Boi?
With my wife and me and my young black buddy it's more like Majorly. And all the more erotic for it
In our case my wife fell in deeply love with my buddy during the agonisingly long very beautiful dawner they had right beside me on our marriage bed the night after she eagerly took his woman-virginity at my instigation.
She fell seriously OUT of love with me at the same time, which has all but extinguished my previously very beautiful love-life with her.
That's raring-to-go Youth for you. What full-blooded woman can resist it?