Well timed query, Mark!
Answer is: this morning! Not Mandy or Betty today, but Jill again and in similar circumstances to previous sightings. I noticed the bathroom door was ajar (visible through the landing window if you recall) when it opened wide and out she came. She'd done that toga-style thing with her towel that women do, which leaves (in her case at least) a very nice cleavage for those who are there to see. And I was!
As per usual, a fleeting glimpse only, with no-one to assist in removal of said towel; still a very welcome glimpse into early-morning suburbia!
DM