OP, please do not take this as an insult, it is most definitely not meant to be, I promise you this, but....
You are a man, a male of the species, the caveman, the provider, so maybe, just a wild, left of field, thought here, but by doing most of the cooking, cleaning housework and working full time and all the other jobs around the house, and fantasising about bringing in other studs to assist, she sees you as being supine, so simply doesn't see you as being shaggable, and therefore emasculated? You state that once things get going, she gets really going, so it's not a physical problem is it?
Is she Dom? Are you Sub? Or is it the other way around? Does she want to be controlled? Maybe this is the discussion you might want to have