Six months ago, while my wife was away on overseas training, my mother-in-law took great care of me. During that time, overwhelmed by pent-up desire, I ended up making a move on her. Surprisingly, this serious and proper woman—the mother of my dutiful wife—revealed an unexpectedly erotic side. She must have come to Tokyo again this time, probably asked by her daughter. Then one night, I accidentally caught her masturbating. She must have been unable to hold back any longer. To me, she’s not just a mother figure—she’s someone who brings even greater pleasure. So tonight… once again.