She indeed went through very complex torment in her heart. To be honest, she's not someone who can tolerate being deceived by others, nor is she so fragile as to be unable to bear the truth. She's really angry about why they had to hide everything from her, making her guess like a fool. Furthermore, she didn't even know her child had such a serious problem, yet she was full of expectations for him.
But what else could she do?
If Su Yu had told her from the beginning, told her that it was him who slept with her and even had an unhealthy child, she probably would have wished to stab him to death, right?
It's not hate, but rather heartbreak for this child.
She doesn't hate Su Yu, because she saved Su Yu's life, and Su Yu saved hers too. Without that accident, she wouldn't have come back to life; in this regard, they evened things out.
But the child is innocent.
