Have you taken her to a basic obedience class??

It just sounds to me that she's become familiar and comfortable in her new house and is starting to show her true colors.

On a side note though, has she been to the vet recently?? Oftentimes when cats and dogs' behavior change dramatically it can be because something is wrong with them, or they are sick. They can't come up to us and say, "Hey, I think I have an ear infection, take me to the vet and get it checked out??" so they get our attention in other ways.