Help with medical expences

My brother-in-law suffered a massive heart attack about 2 weeks ago and unfortunately has passed away. I am looking to help my sister with the medical expenses from the hospital from him being in the critical care for close to 2 weeks. I honestly can not say what the expenses will be but anything will help. All of this will help out her and her son, my nephew in so many ways. Our family is dealing with so much loos at this time, my brother passed a week ago suddenly and now a week later we have we mourn the loss of my brother-in-law.