I second that - husband often pinches my membership and posts something (usually labelling himself "Marg's Man" from within the post) and I think there are a couple of others where they post under one name. Who knows how many are both separately registered? It's hard to know. But from my own personal experience (and husband's) - if you're BOTH lurking/posting here it will strengthen your relationship as well as improve how you cope with your difficult child.
And we thought our relationship was strong already (and it was, I guess) but now it's amazing. Just by being in touch with each other's views and concerns on this site.