The School Beauty Is My Child Bride

I woke up inside a web novel—as the villain destined to lose everything. The twist? The gorgeous school beauty everyone's chasing is actually my arranged child bride. And right now, she's in my room, lying on my bed with those hazy, expectant eyes... This wasn't in the script. The original story had me as the jealous antagonist who gets destroyed by the hero, but now I'm living it for real. Do I follow the plot to my doom, or rewrite my fate with the girl who was always meant to be mine?