Many of the higher ranked wives, or mates, are ordered to stay in the towers for not only safety, but to obey the old tradition of no-show-wifey. Aro has let up slightly, perhaps to accept the modern ways that idiotic man has adapted to. But, you know, he does enjoy thinking like he's still in the year 1300 BC. Sulpicia and Athendora have their own special quarters (and so did Didyme before she was killed).