the fourth installment of the twisted couple series features the big-assed wife, luna tsukino! the wife is definitely cheating. the one thing she hates most is sex with her husband. pretending not to know or notice, she deliberately seeks marital relations. luna, the wife, expresses her dislike, but... due to their marital relationship, she cannot strongly refuse. having sex while being complained about and glared at is very exciting... and then, he silently creamps her. "because we're married, you know".