@photogirl,
Everyone has their own ideas, and what works for one couple is not necessarily going to be good for another. There are no hard and fast etiquette rules for such things.
Are the interactions open and above board, non-secretive? Then I'd say there's little to worry about. Secretive, private message-y, the page is collapsed the minute the spouse walks in the room? That might be cause for some concern, hmm?