I liked this one a lot, and the "Seeping Judy" pun made me smile. I appreciated that their relationship was subtly dysfunctional, and I enjoyed the moment of Judy taking her destiny into her own hands, much to her husband's dismay. I also enjoyed the husband's conflicted pride at his wife's strength and independence and would have liked to see more of that. The narrator says that he had to love her for the magic to work; I would have liked to see more of his regret at having to take over her body, his desperation to conquer her and secret desire not to succeed. But... maybe I'm giving him too much credit. Maybe he wasn't meant to be at all sympathetic.
I think the best thing about this story was the atmosphere. Mundane suburbia mixed with astral projection and symbolic mysticism/magic. The setting turned my crank, perhaps a little more than the story did, but this is more a reflection of the strength of one than the weakness of the other.
Oh, and Dave, don't worry about your daughter. That whole "don't wake a sleepwalker" thing is total BS. It's based entirely on the belief that a sleepwalker's soul is absent and she'll be injured by premature waking, which would be awesome, but isn't true.
I hope so, anyway. My fiance sleepwalks and I'd hate to dislodge her soul. It's bad enough when something else gets in there, even when she's at home; it'd be worse if something actually displaced her. I'd never hear the end of it.