My Fiance is in Love with My Little Sister

There my fianc stood gazing intently at my charming younger sister When I saw them fall in love the moment they laid eyes on each other I was hit with an overwhelming sense of dj vu
Aah again
My fianc had been in love with my younger sister even in my previous life
There was nothing I could do but watch it all unfold
And for some inexplicable reason Im the only one who keeps returning to that exact point in time
Trapped by fate
And yet amidst the turns of the hourglass I still find myself falling for him