such a sad story,but everything always works out,sometimes for the better. step-sister has issues, but that is not unusal in blended families. When my dd was small, at bedtime we would look up at the moon and say
"I see the moon-the moon sees me- God bless the Moon and God bless me"
The night when her daddy died ,she said to the moon , God bless my daddy,because I know that daddy is looking at the moon with me.
She would love to have a quilt like the one you made.
I hope I'm a sweet grandma,as you are