u/Ambitious_Self988

I recently remembered this song that was about a boy who came to live with his step aunt(?) I think and her daughter who was a cheerleader. The daughter fell in love with him but he just wanted her for the sex. In the song we hear both their perspectives and they harmonise together. In the end he leaves home and she makes him promise that he’ll come back next summer or something like that. That’s all I remember, please help me find this song!!