JAV waaa-215

My recent grades have not been good. Seeing how hard I was studying, my older sister encouraged me by promising to follow any of my requests if I achieved a perfect score on the next test. With motivation, I stayed at my desk, diligently studying for the upcoming test. And as a result, I not only achieved a perfect score on this test but on the entire exam this time. And as promised, my sister will follow my requests. During the three days our parents were away, I gave my sister the "seductive bunny outfit" to wear, even though she didn't want to, but because she promised, she reluctantly accepted. Not stopping there, I asked her to call me master, to stroke my cock, to suck my cock, to let me fuck her tits, and even to let me fuck her! At first, she did it to keep her promise, but she felt embarrassed wearing the revealing outfit, excited to call her younger brother master, and even to let her younger brother fuck her, these feelings seemed to awaken the desire within her. She took the initiative to want me to fuck her, to be my "seductive bunny". After three days, our parents finally returned home, and we returned to normal. But she still promised that as long as I achieve a perfect score, she will follow any of my requests.