My adult son and I began a sexual relationship three years ago. After he left for university in Tohoku and struggled to settle into his new life, I meant only to comfort him but ended up giving him my body. Despite being mother and son by blood, our sexual chemistry was disturbingly perfect. Since then, we have promised to meet in Tokyo every year on the Tanabata festival for a single overnight date. This is our third year, and once again I lie to my husband about traveling with friends so I can meet my son...