difficult child 2 has been at grandma's this week, as his sitter has been sick. (bio dad's mom's house). husband picked him up last night. difficult child 1 and difficult child 2 rarely see bio dad, if they do, its usually cause we're visiting grandma and he happens to show up. This is what happened yesterday. Bio dad showed up about 30 minutes before husband arrived at grandma's to pick up difficult child 2. difficult child 2 showed bio-dad his teeth, shirt, legoes, etc, all in all, great...on his own he referred to and called him Dad, which is normal now that he finally recognizes the man. About 10 minutes before husband got there, difficult child 2 started telling a story and got confused...he was talking about husband but was fighting with words. Grandma changed the subject which he went right along with...When husband then showed up, difficult child 2 ran to him all great, hugs, etc, puts on shoes etc and calls back and says, "Bye <bio-dad's first name>." difficult child 2's at grandma's again this morning, and she told me this when I dropped him off. She thought it was almost comical. 5 years old and has it figured out!! The story he was telling and the reason he was having a problem was in what noun to use, really obvious to grandma...but she didn't think bio-dad caught it at all. (By the way, all of bio dad's family are supportive of allowing difficult child to refer to husband however he choses. And he interchanges husband's name and "dad" frequently, no one makes an issue of it.) When difficult child 2 is "on", he's on, and he knows what's going on.