17 yr. old granddaughter saying rude, unkind things to me (grandmother)What can I do?

At Christmas when I asked to talk to her, she told me that she had to leave for an appointment. I asked her why she was being unkind to grandma (me) and grandpa (my husband). I told her that she only cared about herself and her girlfriends and she never seemed to want to spend time with us. She told me that every time you guys come around there is drama, and I am sick of it. It sounded like the words were right out of her mother's mouth. She had never talked to me like that. She and I have been very close (she told me things that she would never tell mom and dad) all of her life. She was the first grandchild. She started acting differently when she broke up with her boyfriend of 3 1/2 yrs this past Aug 08. She turned into a selfish, angry, unkind girl. She no longer cared what she said to whom. When I would try to talk to her about it, she would say that she treats everyone the same. I told her "honey, you can't treat me like that cause I'm your grandma, your best friend. Instead of her mother being a disciplinarian, she encourages her, and tries to be her best friend. My son is a peace officer at a prison, and he is gone 3 nights out of the week at work, working double shifts so he has more time to spend with his family. When he comes home, his wife dumps all of the problems and discipline on him. When we were there at Christmas, the daughter in law, son was at work, asked me to get out of the kitchen when I was cleaning, blamed everything that happened on us being there and kept dropping hints that we were imposing by being there.I would tell my son what happened, but he only believes what his wife tells him. When I tell him something, he always says that is not what "A" (wife) said. What can I do? They're a very dysfunctional family, even when we are not there. When we are there, I (not husband) gets blamed for everything that happens. If it concerns me, I try to talk about it. I took care of her as a baby, and we bonded. We moved to MT when she was 10.