My girlfriend, Seira, who I recently got, is a kind and gentle girl. However, she's shy about sex, and I felt a little unsatisfied. One day, I was invited to Seira's house to study together. I thought it would be a wonderful family and full of happiness, but then... an amazing mom appeared to greet me! "Ara? Did you bring a boy? So cute~" Mama Saki looks like she has a strong sex drive and is a beast-like type. Mama seemed to think I was prey in an instant, and she approaches my boyfriend's dick while avoiding her daughter's eyes. There's no escape in the house, my dick, defeated by Mama Saki's eroticism, is already fully erect! Her mom, who is always on the verge of a sex drive explosion, seduces me by targeting my dick even when her daughter is nearby - a lewd, big-breasted slut!!!