When my wife and I discuss the possibility of working together on a business, our main concern is about spending almost every waking hour together or in contact with each other. Neither of us can stand being around the same people constantly. Hell, neither of us can stand being around people constantly. I don't think I could do the 12/7 or 14/7 startup thing at all unless I was spending significant portions of that time locked up by myself. If I tried to do that with my wife, or anyone else I was living with for that matter, it would be disastrous. Is that ever an issue for you?