Thank you everyone. I really appreciate your kind words and support.
The crux of the disagreement between my siblings and I is that they buy-in to the argument that "she only drinks after 3pm" so have no problem leaving their kids with her before that time. In contrast, I have said that I won't schedule my life around her drinking habit.
At this moment, she is hammering me with nasty texts about how I am so judgmental. I don't even know what to say. What's the point in guilting her about not coming to see my daughter? If she cared she would come see her.