|This is a beautiful tribute to your mom, and as such, I really hesitate to give any feedback that would suggest improvements - especially, because as you stated in the first paragraph, you were writing this the same day she passed away. It is raw with love and emotion, and the hurt you felt when she passed away. That being said, I will offer my suggestions for you to either use or discard as you see fit:
"Love those who might not know God love otherwise" - I believe "God's" would work just a bit better here.
"to love those who might know love otherwise. " - I think adding the word "not" between might and know would work better because it seems your mom's message was to show love where one has not known love before.
"I heard her say that I love you but I do not like what you are doing." - I heard her say, "I love you, but I do not like what you are doing."
There are other examples, such as her and Dad quipping, "Where did we get this guy?" - but I don't want to tear apart your poignant piece about your mother.
Please accept my suggestions as just that -suggestions. They are in no way meant as disrespect or to hurt you during an already painful time. Whether you change this or not, it is still a very beautiful tribute to your mother, and I really enjoyed reading!
Keep writing - it is healing!