That's all you got to remember is that you Toffee and your sister had a really good time over the years.And that she stayed with you and your sister over the years, I think a lot of horses and ponies would wish for the same thing.
I'm so sorry for the wonderful horse you've lost but what a lovely tribute and a celebration of a horse's life well lived and enjoyed and she was so loved by you and your sister, what more could a horse want?