this is a trick question correct? or an initiation?
hmm
I would venture to guess what happened , happened, after the verified phone call and before the housekeeper arrived, who was locked out.
And I don't think Mr. H would have forgotten the key for her per usual, if he had gone for a stroll...or off 'willingly', with...say whomever claimed to have been there that morning to handymanatize. Mr. H strikes me as a disciplined man who would have left her a key.
And her sitting there was not a happy surprise. , when someone got back from where ever they went to. Egads, can you say CYA.
So I might deduce there was limited window ...at most 2 hrs, 1 at least...
so split the diff and say 90 mins. Hour and a half
wasn't a lot of time to coordinate the details, was there