I have a very beautiful and obedient younger sister, although she is in the most beautiful age of her youth, she has never had a love affair. As a responsible older brother, I always care about her, so one fine day, when my parents were away, I helped her know what the feeling of happiness in love is. We made love for a long time and she must have unintentionally enjoyed it, especially when I ejaculated into her vagina, she kept moaning in pleasure.