Jeff, I know exactly what you mean.

Interestingly, in my case, I actually married one of my wife's
alters before either of us knew about MPD. Later, as things
progressed, I discovered who the host was, and fortunately, we get
along just fine! It's been a real adventure of getting to know
someone all over again. So when you mentioned the Twilight Zone, I
smiled. No one would believe this if they didn't know about DID.

We've been able to identify seven distinct personalities, two of
whom doen't even know they are married to me, but whom I've only met
once. But as the husband, I am supportive, and I love all of "them"
as disassociative parts of the one complete girl. I have learned a
lot. Sometimes it's fascinating. Sometimes it's frustrating. But
nice to know there are others in my position out there.

Sincerely, Wayne