You and your wife shouldn't be sharing the same Apple ID. You've been using the photo stream feature in a way that wasn't intended and now it's broken because you've turned on iCloud Photo Library. If you want to go back to using photostream then you need to turn off iCloud Photo Library on your device and your wife's device and make sure photostream is turned on in both. If you want to use it iCloud Photo Library you'll have to use it the way it was intended, with seperate Apple IDs each. Then you could create a iCloud Photo album and share your photos there but it won't be automatic, you'll have to manually share them.It still doesn't work well. It sometimes uploads sometimes don't. My wife took 10 photos today and it never uploaded to stream