My older sister couldn't stand to see me being mocked by my classmates for being a virgin, so she gently taught me about sex. I ejaculated many times with her hands and mouth! But my rock hard cock didn't go down, and my older sister's eyes sparkled. "I'm just imitating," she said, "You can't be embarrassed during the real thing," and as she gently led me, I rubbed my raw cock against her pussy, and we accidentally inserted it! Before you know it, your sister is arching her back and cumming like crazy, and you get to cum inside her!