I was enjoying living alone for the first time in a while. Her wife is pregnant and has returned home. My girlfriend's sister-in-law, Miyuki, was worried about me being alone and came to check on her. She was fed up with the dilapidated house, and thought it was a blessing to invite her into the house, but... Miyuki suddenly smiled suspiciously and said something strange. ``Men's cheating rates are highest when their wives are pregnant.''