It's great that you have supportive people around (in-house beta readers!), but writing is very intimate, and you get to have your time with "the door closed," as Stephen King says. (Personally, I can't even blow my nose with someone watching, but I'm one of those ultra-senstive migraineur types. Seriously, I have a medical excuse!) How about this:
1) Have your partner (and other interested parties) actually read King's On Writing. It's a great read for anyone (bring tissues for the first half ) and will give them some insight into the creative process. You could even read it at the same time and get together over coffee to discuss it.
2) Give your "fans" a clue to your creative process, i.e. at what point in the process you'll actually want input. Maybe after you've gotten a chapter or two to the Beta Read point, your fans could be reading those chapters while you're roughing out subsequent chapters "behind closed doors."
3) Maybe your partner, et al. might want to work on their own stuff??? (It's pretty amazing, to mention Stephen King again, how everyone in King's family is a writer except for one "black sheep" daughter who's a Unitarian minister. And, everyone in Robert Crumb's family wound up creating their own comic book.) Art's contagious!
Good luck! Let us know what happens.