Ah a favorite flavor indeed. There is a bunch of story's along this line.

Allie an Nicole
Mothers Submision
Ann & Alicia
Maria and her daughters

There a a bunch of them. Sadly they never get flushed out as far as I would like them to be.

so if you do right it please do it right and finishit. Don't let it be a one chapter thing

And for those wonderful authers that wrote those storys please write more!!!