Oh my gosh!!!!! I would say very sorry to hear very sad news about her. And I believed that now she's staying with our God. Anyhow life must go on I believe that you can take her place to be a good father and mother at the same time. And I sending you a thum up and will be your friend when you feel alone or need any advice otherwise I'm also single and never been mother before but I have my own experience to take care my sister as well.