Forbidden Love (C.T.H)

Adior is a 19 year old girl who's in love with Calum Hood.
But she isn't any ordinary girl or some fan...
She's Michael Clifford's sister.
Aka, the guitarist for the band 5 Seconds Of Summer.
And Calum Hood is his bandmate.
What happens when Michael finds out his little sister and his best friend/band mate love each other?
Will he allow them to date? Or will it end up being forbidden love??