My father-in-law suddenly came to stay after fighting with my mother-in-law, and my husband reluctantly agreed to give him a room for one week. With our sex life on hold, I was already frustrated when I entered his room for laundry and caught sight of his enormous erection. Before I knew it, I was staring and masturbating—but he had filmed everything. He used the footage to push my boundaries step by step: first my mouth, then rubbing, then “only three centimeters.” His cock gradually took over my body, and our unexpected compatibility made me cum again and again.