Ohhh I think the little lady is showing her sisterly jealousy, certainly children fight for their parents' attention and I can assure you that it will be like that even when they are older, I still argue with my dad when he decides to spend some time at my sister's house ha ha ha ha. And regarding your beautiful baby I think it's great that you don't worry too much because she hasn't started walking, if her pediatrician says she is physically fine then you just have to wait until one day she surprises you and instead of walking she decides to run away. Thanks for sharing.