I am sorry i am just now reading this my heart goes out to you and her family.
Father right in the name of Jesus we come before you and lift up Amanda and Sarah's family. It is a rough thing to lose one, give them comfort and peace speak to their heart. Send them angels to keep them company.
Let them know that they are never truly alone for you are with them. You are Lord and can heal and mend broken hearts. In Jesus name, Amen!