Possible, i suppose. but then where is she?
i sleepwalk. not often. often enough to put furniture in front of a hotel bedroom door just in case, though. to try to halt an impending disaster of toppling down strange stairs, for example.
it's a bit of a burden. it takes a person/people a little time to realise when they are speaking to me in that altered state while i'm inevitably crashing around a room (whose layout is clearly unfamiliar) i'm not really all there at all. and i
do converse with them, after a fashion. nonsense, much of the time. disjointedly.
sometimes i remember snatches of conversations and what i did, sometimes not.
i wake and realise what's happening. often i cannot understand where i am.
"He hasn't sleep walked in several years, but after that episode I'm still paranoid."
i'm sorry to add to your paranoia, but you are right to be.
for me, i'd say it happens maybe once every 5 or so years. significant other has only seen it happening once in 8 years.
ETA: one can travel quite a distance, when there are no barriers, in a sleepwalking state. although i'd estimate i've only ever made it about 50 yards. as far as i am aware!
I'm finding the way this case might be winding I could become a comedianne, but everything wouldn't really be funny at all because Madeleine is gone right now. Sometimes I like to lighten up a serious confusing subject with a smile at the end!
