"Well I would've expected a door to the bathroom direct from the bedroom, but clearly that's not happening, unless there's a secret passage, but who would install a secret passage to their bathroom? So let's try the sitting room and see."
The sitting room, it is immediately apparent, does have another exit: a broad open arch leading into a long hall. It's in the same wall as the door in from the central hallway, and there's a big dust-covered something-or-other standing between them, so it wouldn't have been obvious at a glance from that vantage. She ventures down it, paying careful attention to footing and using her flashlight a lot.
First up on the left is a completely open doorway to a very ostentatious-looking bathroom. She ignores it for now and heads deeper. Next is a second completely open doorway to the same ostentatious-looking bathroom, opposite a door which she opens to reveal a massive, completely empty closet. The next door after that is the very end of the hall, which she opens just long enough to confirm that it leads to more hallway-looking stuff and therefore probably out of the suite.
Now she turns around and heads back into the open(???) bathroom. There's a door on the right of the right-hand open doorway, a door on the left of the left-hand open doorway, a needlessly enormous sink on each side, a big empty space in the middle, a frosted glass cubicle in the far corner on the left, a third door in the far corner on the right, but most of all there is A Bathtub, a preposterously large claw-footed ceramic vessel that looks about ready to sail the high seas if only someone would supply it with a mast and figurehead. It sits at the very far end of the room in its own grand alcove, surrounded by windows.
"The, I, what," splutters Rosy, training her flashlight on this nonsense. "Why is there a, Tub Nub. Why is it practically a greenhouse. This is the most exhibitionistic bathroom I've ever seen. Also, where's the toilet???"