
Big jump here, suddenly 3 years time skip?

She was comatose for three years and just woke up. While in comatose, she still grew healthy because of the care of her siblings. I think it was about after she had a flashback about her past life then she didn't notice that she's in comatose instead of just sleeping. That's why she's surprised to see her she's older than she thought.
Dafuc (⊙…⊙ )