Red's already caught the Daphne and Seamus errors; I didn't see much else off, other than a couple of missing commas and I think that Ficwad sometimes just drops commas for no reason.
Harry and the rest are in for a bit of a surprise, but I reckon they'll enjoy it. ;-)
If Harry's smart (and I'm sure he will be, given his choice in girlfriends), he'll let his wives have the running of his household. Outside in the world he'll have plenty of other venues to be his own man in. They're smart girls, and they'll respect that, I think.