Here's a spoiler, from the beginning the husband didn't mind his wife resorting to a "health service" to fulfill her needs. He didn't want to see or know, but as long as it was just a business transaction, he was willing to put up with that. He finds out that the wife is seeing the kid outside of the "health service company" and he freaks out. She agrees to stop seeing the kid but, of course, the kid begs for one last time. The wife, of course, agrees to it and the kid gives her the dicking of her life. Then the wife realizes it's all about the dick and submits to the kid....... joking, the wife says goodbye to the kid, goes home, even confesses to the husband that she just betrayed him once more and begs for forgiveness. The husband shoulders some of the blame (he did suggest the health service himself) and they remain together with their son. Surprising to see a hentai example of a woman who doesn't throw away her entire life because a good fuck.