.

That's terrifying Σ(っ°Д °;)っ

Nah. She just uses power so she needs to rest afterwards.

Absolutely not. She cannot have short life. It's impossible for her to die young twice. The hour glass is given to her to change her future. That's its power

Yeah I think it shortening her lifespan, but not too badly... Like when her time is reversed, everyone's age is also set five minutes back, except for hers. So she's basically aging twice as fast in the time she uses the hourglass. There might be some extra aging in the sleep too, I'm not sure.