My apologies, I must have misread something. But this part still stands...
This theory has as much reasoning behind it as suggesting that Vanille is actually Snow's mother with a sex change. While some theories of yours might have some vague reasoning behind them, this one is right out there, I have to say.
This theory has no basis behind it whatsoever. It also is pretty much impossible. There is a gap of hundreds upon hundreds of years. Also, while S-E might have a history of subtleties (I for one always found things to be pretty obvious, and the only subtleties are things that you yourself have never been able to prove), they always fill you in on the details that are required to lead you to such conclusions. There is absolutely no evidence for this theory whatsoever.

Even if they did have husbands and children, it should be noted that they were crystalised for roughly 500 years or so. That would make them not grandparents, but great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great, great grandparents.

If you read the official short stories you will find no mention of any husbands or children. Given that it goes through what they think about, this would be one of their initial concerns as mothers and wives, but they do not even think about it once. There is no evidence whatsoever for what you are getting at, and unless you establish what it is that you want to say, I feel that this one is so far fetched that it may be worth considering closing. I can understand keeping some of your theory threads open but you have many and this is probably the first one I would get rid of. You have to concede that sometimes the story is as it is read.