As far as milking your goat goes, most nubians are excellent mothers so if she is pregnant her kids should nurse just fine. Meaning...you won't have to milk her unless you want the milk out of her for yourself. If this is the case, some goats don't like their udders touched by humans but the more contact you have with her the better she will be about letting you touch her udder to milk her. If you're worried about what to do when you wean her kids (taking the kids off of their mom so they can feed off hay and/or grain by themselves) her udder will be sore for a while with no kids sucking on her. But you don't have to milk her. Letting her "dry up" is healthier for her than keeping her in milk all year long.