Ok, I just have to get this off my chest. DH has a 17yo daughter from a prior relationship (doesn't live with us), and we have a 7mo. DD1 is jealous of DD2. As in, she didn't want to come meet her new sister, she doesn't want to hold her, she says things like, "Ew. You're wet and icky" if DD2 has spit on her hands (um, she's a BABY, for cripes sake). Seriously? I'd expect this from a 5yo, but not an almost-adult.
Ok, sorry, just needed to vent in a safe place.