I'm working on a story with an Indian woman protagonist now, but she is younger and dealing with an arranged marriage. The mom idea is super hot also I think. They get married very young sometimes, so keep that in mind. I know a gorgeous Indian woman in her thirties whose mom is also very hot, in her early 50s.
I'm not really into the incest genre, but I'm sure you will get tons of happy readers (and an equal number of trolls) if you get mom and daughter in once scene. Mom could prep daughter for marriage... lots of potential there, ha.