My brother's wife suddenly came to visit in the middle of the night. When I asked my sister-in-law, who had forced her way in, she told me that she had had a fight with her husband and ran out. I had no choice but to let her stay with me for a few days, but I was nervous about the strange closeness we felt. When she noticed my crotch, which I had unintentionally become erect, she began to seduce me, asking if I would give her a handjob as a thank you for letting me stay with her...