One day, my father-in-law comes to stay after arguing with his wife. I cannot turn him away, so my husband and I agree to let him remain for one week. Days later, I enter his room to collect the laundry and notice his huge bulge even as he sleeps. The thought that he is bigger than my husband makes me masturbate on the spot. But he secretly records me and uses the footage to demand more—first my hand, then my mouth, then “just three centimeters”—gradually claiming my body piece by piece...