My sis/big brothers dad is in Intensive care unit, his body is all swollen and he's on oxygen. He…

My sis/big brothers dad is in Intensive care unit, his body is all swollen and he's on oxygen. He has heart failure and lung cancer... My other brother in GA been keeping my mom in the loop about it. So she told My sis she needed to go see her daddy. And my sis shrugged it off, didn't say a word to her and went to her room Like she didn't care. Like I understand you don't know your dad really like that growing up but that's still your dad and he could die so she and my bro should go see their dad. Guess her dude doesn't want her going anywhere idk. But kinda crazy if you ask me.