How can Sade tell that they're meddling with time? Does she have some similar abilities?
It would be wild if Sade was also somehow a time traveler in her own right...
If I had someone I loved dearly and they died, a time traveler like Zain would be my wish come true - go back to the past and save them.
The fact that Sade is seeing Zain as an obstacle rather than something miraculous implies that maybe she already did just that...