My mother-in-law is harsh towards me. Even if I talk to my husband about it, he's a mama's boy so it's no use. My father-in-law pretends not to know. I endure it day by day, holding back my tears. One day when my husband is away on a business trip, I witness my father-in-law masturbating and get an idea. "Okay! I'll cuckold my father-in-law and get revenge." From that day on, even though my mother-in-law is nearby, the lewd revenge plan begins everywhere in the house.