@Wyoducklover Welcome to BYC..
I would separate the drakes from the females your female looks pretty chewed up and next will be her skin.
If you plan on keeping 2drakes you need to add more females it's best to have at least 2 females per drake but actually 3-4 per drake is better.
How old is she? if over 5 months she should be laying. at least by 7 months old. you haven't seen them mate? what is he doing to her then? just beating her up? They can be pretty rough on them when mating and if they are both over 6 months old I'd say they have to be mating or you have 2 of...
I'd try Mallards, if your wanting to keep it small, but i wouldn't wait too long to make the decision if your worried about your duck being over bred by your drake. Have you checked craigslist in your area for calls?
Does it have to be another call? why not another duck of another breed that is about the only way your going to get this situation even a little bit under control if you can't separate them. He most likely won't kill her they use the ducks feathers as a way to hold on since they haven't got...