Little secret (Fifth Harmony/You/Camila Cabello)

Y/n Bonilla is Fifth Harmony and Camila Cabello girlfriend.
The girls have been acting differently. They will stay out late and then come home early in the morning. And when they do come home they just come home to have sex with Y/n.
They don't even let Y/n orgasm.
What happens when Y/n has enough?
What happens when Y/n has her secret?
What happens when they all do?