Maria got everything while her siblings were disinherited. Does she have to pay them anything from the estate?

Q. My mother passed away a few months ago and she left her entire estate to me, explicitly disowning my brother and sister. Ten years ago, my mother gave them $200,000 each as an advance on their inheritance to start their own businesses. The businesses didn’t work out and both my siblings asked my mother for more. When she said “No,” they never spoke to her again. I cared for my mother (she had cancer but not dementia) and two years ago she rewrote her will and left me everything. My siblings are now saying I poisoned her against them and took advantage of m...