Oh my goodness. I'm so, so sorry for your loss. I totally understand because I had a sister who died at 32 as well and left behind a 14 year old. It is not easy...for anyone in the family, but especially her children.
My niece went through many battles after her mom passed away. It was a struggle for me because she lived with me for a while. My oldest sister then took her with her and she calmed down (she took her to a small town in Penn, where she couldn't do anything) and she met her husband there. They are both saved now, and have 2 small children with one on the way. She is a blessing to my life and I thank God for her everyday.
I will be praying for you and if you would like to talk, please pm me.
Blessings to you and your family during this tough time.