I find motherhood painful now. I don't know if I am doing right by daughters, seeing them cry when I tell them "no" not being able to understand my little one, and she gets so frustrated. They're both sick right now, and miserable, and I am so limited in what I can do for them. This is way harder than birth ever was.
And I know Mary was spared this pain. Although she saw her Son die, way worse than anything else.
Please know that you are doing right by your daughters by telling them "no". Believe me, I have seen far too many parents let the crying get the children their way. By giving into the crying they are actually harming the kid instead of helping him to learn. Such children grow up miserable because their parents, by not exerting external controls while the children were young, never taught them how to develop internal controls.
Sorry to hear your little ones are sick. It's no picnic.