The other spare room was only about the same size as Roess pink floral horror - the room where there wasn't space for both a cot and a chest of drawers, so I think she'd struggle to get 2 beds in there.
I still think they don't sleep in the annex regularly unless Harry is over/ TanJoe stays there as well but only because all the boys, Rex included, are basically crashing out on the sofa or her bed (while TanJoe sleeps in Rex's bed - hence why she's not bothered about the bathroom risks). Which is still tit because what kid wants to be dossing on the sofa every night because their actual bedroom is in a separate building?
She bought that house because she was blinded by the size of the plot, the pool and the 'gram opportunities, and as they'd reduced the price and she thought she was getting a bargain (she wasn't). It just proves that Instafame and getting stuff for free is more of a priority for her than her own kids, which is pretty sad.
TanJoe is responsible too for allowing it, but as this is all Stacey's money, I suspect he doesn't get much of a say.