JUR-268 Why is there a wife next door, even though I have a wife? A caring mommy friend suggests a threesome to "solve our sexless marriage."

I've been married to Kana for a few years now, but recently we've been having no sex. The only saving grace is the Satsuki family who live next door, who look after me as a senior couple, but... One day, while we were arguing, Fumino came to mediate. Kana seems to be consulting me about nighttime affairs and thinks I'm at fault. I feel bad when she scolds me because she's such a laid-back person. I stand there feeling intimidated, but suddenly Fumino says, "That's right! I'll help you with sex!"!