Piper had new neighbours, her mum said they had a boy and a girl.
Piper made herself look special before going to meet them, she planned to seduce the boy.
Then she finds out the boy is only 9.
All is not lost though, the daughter is gorgeous, and the mum is spectacular.
From that moment on, Piper's world view changes immeasurably.
Note, male adult gay sex tags. Bisexuality is a major theme of the story, there is no graphic male gay sex, just brief mentions. I included the tags for those offended, not to attract readers.