MIMK-125 My girlfriend's slutty sister

My girlfriend and I have been together for two months, our relationship is extremely platonic. Today her parents went on a trip so it was just her and her sister. My girlfriend and I have been together for two months, our relationship is extremely platonic.

Today my girlfriend's parents went away traveling so it was just her and her sister Sumire at home. She immediately invited me to her house to visit and it seemed like this was the breakthrough for our relationship. At home, she immediately invited me to her house to play and it seemed like this was the breakthrough for our relationship.

Just arriving at the house, I met her sister. My first impression of her was that she was very beautiful, elegant and innocent. But during dinner that night, when my girlfriend went to the bathroom, she immediately came close to me, whispered lustful words into my ear and then suddenly kissed me.

The sweetness of the tip of her tongue , the scent from her body combined with her lewd words made my penis uncontrollably erect.

Seeing that I seemed uncomfortable, she immediately helped me solve it, rubbing it. Calm the little guy for me. And from there, our secret relationship began, we secretly made love to each other even when my girlfriend was around!!!