[serious] Sister passed away with three children.

Saturday night around 1AM we get a call that my sister was in a car accident. She has a terrible driving history and has had many accidents that she has walked away from with just a bruise. She lost control in the rain driving my mother's car and hit a tree head on. She was unconscious when ems arrive and they needed to perform cpr. She has suffered multiple heart attacks over the next 24 hours. It also turns out that the air bags in my mother's car she was leasing did not have the air bags deploy. Last night her kidneys failed and after the third scan they declared ber brain dead. My family has decided to let her go peacefully this week. She leaves behind three children. One 20, 12 and 5. The eldest has lived with my wife and I for over half a year now. I talked to her husband and he has agreed to Grant my wife and I guardianship of the 12 year old daughter to keep her with her roots. He is talking his son down home to Harlem.Now a backstory. My sister was the sole income for these children. Her husband is a drug addict who always sold her jewelery and left to get high. He has never had a job for longer then 6 months not paid any bills other then purchasing marijuana. He is taking the 5 year old to his mothers in Harlem. It's a three bedroom with 4 people already living there. He promotes a lazy, unhealthy lifestyle and just puts him in front of a TV all day while he smokes and watched YouTube. He is unfit to be a parent but I need to somehow get this child from him. My sister wanted this but she never made a will stating this.This is so much that I don't know what to do. Last week I was just worrying about sleeping in late. This week I am a dad to these children who need me. What do I do? Are there any tips or paths I should take? I'm just afraid I won't be the man they need, but as a dying wish I promised her I wouldn't let anything happen to her children. via /r/Parenting http://ift.tt/2fKuIiG