I am so sorry for the tragic losses in your family. My understanding is that salvation is a work done wholly by God through His Son Jesus Christ.
The scripture says in Romans 8 paraphrased: nothing can separate us from the love of God in Christ Jesus. Therefore mental illness and suicide cannot separate a true child of God from His love.
Whatever the Church’s decisions about where our mortal remains may be buried, we can take comfort that the destination of our eternal souls rest at the sole discretion of a holy, gracious and loving God who knows us and accepts us in His Son Jesus Christ.
Thank you for your kind words. I take much comfort in knowing that she is with God. She was such a beautiful person, inside and out; full of warmth which she graciously extended to anyone she met. Only God could have created such beauty and I know in my heart he welcomed her home and made her whole again.