Taking dick is nothing for most women, it is easy they do when they want and they do it when they don’t really want, so if you expressed you want her to fuck other men she might be thinking well I want you to also fuck other men. This is our thing, we do this together. You don’t seem to be exactly upset about it either. She could be thinking, we have a shared hobby we go out and get new men. Then talk about it at breakfast.