SPRD-931 Mother-in-law, you're so much better than my wife... Tsukishima Kogiku

It's been a few years since my father-in-law passed away. I came to Tokyo to visit my mother-in-law, who lives in the countryside. My mother-in-law, Kogiku, is still in her 40s and gave birth to my wife at an early age. She's plump and pale, and I'd been interested in her since I went to her house to ask about her marriage. My wife is, of course, lovely, and we have a child, so I'd been hiding my feelings. When I heard that Kogiku was coming to stay at our house for the first time in years, I was so happy. I couldn't sleep because I was so excited to see her again. My wife doesn't really like sex, and Kogiku seems to be expecting a second child... but when I saw her underwear in the laundry basket, I lost all reason and couldn't help but sniff her passionately. I was frantically stroking my painfully erect penis when Kogiku caught me... I told her I'd let her out just this once, but I couldn't help but yearn for her and have sex with her.