Maybe its a way of her mending fences. There comes a time (usually when we are older) that we just need to get on with things and sometimes its easier to do that without hashing out the reasons you/her were at odds. Which could bring up alot of bad memories and memories that may not be the same for each one of you. Since you made it, I'd send it to her and see what happens. If she stays in contact then bridges are mended or on the way to being mended. It would be easier on her daughter too. People think my family is weird because my best friend is my ex's wife. I figure I would like her if she wasn't married to him so why not just like her. It has made it easier over the past 30 some years on our kids and spouse's because we can do family things together without any awkwardness or fighting and she's always the first one there when I need something. Life's too short to not and take advantage of trying to get along if possible.