My long-missing father-in-law suddenly appeared at the house I share with my husband. He had left the family when my husband was little, so the two of them could barely stand each other. His return left me with mixed feelings, but my biggest problem was still that sex with my husband never satisfied me. After he fucked me, I would go running to take my mind off the frustration. Then one afternoon, while both my husband and father-in-law were out, I reached my limit and lost myself in masturbation—only for my father-in-law to come home and catch me...