I've been dating my girlfriend for half a year, and we always get along well. But behind her back, I've also started a secret affair with her mother. It all began a short while ago, when I visited their house while my girlfriend was away. Her mother warmly welcomed me, and during that time alone together, the atmosphere gradually shifted. Slowly but surely, romantic feelings developed between us. Before long, we ended up in a forbidden relationship—right under my girlfriend's nose.