She wouldn't see her lively Yafu, her baby, anymore.
Strictly speaking, she isn't unable to sleep, she's just too scared to.
On her way here today, she overheard nurses talking about her, saying she's strong, so impressive, that despite the rumors that her child was dying, she didn't cry out of fear. Instead, she criticized the doctor's medical skills, demanded a specialist, and remained calm even when the specialist confirmed that her son might never wake up. They admired her, yet some couldn't help but label her as cold-blooded, how could she stay so composed when her own son was in such a condition.
They said she was calm not because she was strong but because she didn't care about her son. If she truly cared, she would have collapsed by now!
