We have been married 55 years and I could count on both hands the number of times my wife has sucked my cock, and I have cum in her mouth only once in the 55-60 years we have been fucking together (I took her cherry when we were 1
oral sex and the exchange of body fluids orally is just not her thing.
We started swinging and M F M threesomes in our mid 30's, most guys want their cock sucked during a sexual encounter and she would oblige with most guys getting their cock sucked a little, but never even close to cuming, over the 30 + years we have played I have seen her suck more different cocks than she has ever sucked my cock, to her, cum is for her pussy, all our playing has been bare back and I love going silky seconds and her cream pies after she has been with other guys.
One of her little kinks is-was with guys we had a long term relationship with at some time or other she would like to masterbate the guy to the point of him cuming, just so she could see him cum, to each their own I guess, and we all enjoyed it.
We are now mid 70's, and are not actively playing with others, but w sure have good memories.