Anime like this could be great to put on while waiting for Christmas day/New Years Day. The different culture aspects of the characters are likely to grasped the attention even to those non-anime enthusiasts like your mom. Also deep topics explored ingrained even in our society like discrimination (and in kind of racism) is greatly appealing to them. Glad you got her interested.
Would like to watch this sometime but with a high chance of just reading it via manga.