A single mother moved into the apartment next to the one I live in. She seems kind, but she always smiles with a lonely look on her face. I care about her, so I lend her a hand when she needs a man, and she takes care of me when I'm sick. We lived peaceful lives like this until one day her ex-husband suddenly showed up. I couldn't resist seeing her, hurt but still brave, and I embraced her madly. We have passionate sex, desiring each other.