Both my wife and I have iPads and iPhones running ios9, and both of course have Notes, as well as Pages. We also use family sharing. So, how do I make a document and both have the ability to edit and collaborate on it?
Here's the thing. Apple isn't that good with productivity. The king of collaborative documents as of now is Google with google docs. That said, it is possible to collaborate, but you both have to use the web version of pages on iCloud.com.