I have Hrefna and Gralnach as children in Hearthfire. After doing some quests I came back to my house in Whiterun, Hrefna was apparently arguing with Gralnach (I didn't see this for myself the dialog came up when they argue). Anyways I didn't see Gralnach so I went all around the city searching... I still can't find him!!! I heard children can get taken by bandits, but I didn't find a note. I went up to my husband, and asked how the "kids" were so Gralnach isn't dead. Can they run away?? If so how can I get them back???