well, I'd say the key factor is consent. I don't know about most posters take on it, some feminists would critizise the lifestyle, and detest the idea, even if is consensual, *surprise*, but I wouldn't care about that, I think in your case is that you both agree on that, and that it looks as, from your posts, that that is what she prefers, for you to be in charge, as it could be somehow of a burden, or probably other reasons, but given that this is consensual then I don't have anything bad to say about this.
It is your lifestyle, both of you, and if other people don't like it, that shouldn't be your problem, should it?