The Giant Ones - a Charmed giantess story

I wrote this about eight years ago, as part of a giantess story contest based on a particular tv series. At the time I'd hardly seen anything of Charmed, and haven't made up for that since, so this story is packed full of stuff that doesn't fit with the tv show at all. Think I only chose it because of all the series we were allowed to choose from, the girls in this one were the ones I'd most like to see giant-sized. Still, I later saw it in the #1 slot on someone's list of fave giantess stories, so someone must have liked it! Anyway, enjoy - or not!