Regarding Vivian's husband. Over 22 years of married life, love, or rather infatuation, develops into respect and trust, then into indifference. Vivian's husband cannot but know that his wife is a nymphomaniac, no matter how much she hides it. Only the second option is real here. We do not know how their relationship developed. Most likely, this is a tacit agreement and a certain patience, because they have a son together.
The author's strong point is the scene in the backyard. The author did not specifically show us the foreplay. The story begins with Vivian's husband, who catches his wife having sex with someone else's husband.
This is, of course, a SHOCK! It is one thing to know that his wife is cheating, but quite another to see it with your own eyes. Jealousy develops into a painful resentment. Then another betrayal, then another and another...
INSULT is very painful and does not pass easily and quickly. Rethinking a new reality takes quite a long time, especially if you are a sensitive person.
/I say this because in my distant youth I myself had a nymphomaniac wife, naively hoping that I could change her. But no, these are vain hopes. And although I did not see any frank scenes, but not even a year of our life together had passed when I kicked her out. And you know what is interesting. There were no arguments, no quarrels, not a single (!) tear, she did not care. She simply took a certain financial bonus from me and left. I never saw her again. Respect to the author of this story - I again felt these painful feelings that, it would seem, had been forgotten long ago./