My husband is away on a business trip... I quietly continue to twist and sway my hips on my magnificent father-in-law. (Sakurai Asami, PRED-387)

Mami, a young wife who hasn't had sex with her husband, is frustrated by the large amount of toilet paper her exceptionally talented father-in-law uses for masturbation. Suspecting her husband of having an affair while he's away on a business trip, and feeling sexually unsatisfied... she finally crosses the line and has sex with her father-in-law...