Taffy I am so sad for you, but the end of the journey has come.
I am not sure what your mum meant by scattering her to the four winds, perhaps you could have some of her ashes buried with her mother, and the rest placed on a mountain top - is that allowed? Is there a favourite hill that she had? My dad had a specific request when he died, and I had to go along with it, but I wish I hadn't. But at the end of the day, does it matter Taffy, your mum has gone, you looked after her, did everything you could do, much love to you.
Margaret