Ignorance or Just Plain Mean

My grandmother is very very sick. She has been quite sick and far from herself for quite sometime. After the Christmas fiasco, I decided that I want nothing to do with my mom's sisters family. I went to visit my grandmother this weekend, and as I was leaving, she starts telling me all of these things that I have done "wrong" since I married Carl. Most of these actions can seem somewhat mean, if taken out of context, however "taken out of context" is the key to understanding the situation.
My cousins and aunt have done a number on my grandmother, and in some instances have flat out lied to her. My cousin Melissa told my grandmother a whopper about Christmas evening, something about me not letting her take pictures of the girls, for example. I can't really figure out why. The woman is old and sick; why make up, embellish, or take situations out of context to upset her? Melissa showed my grandmother pictures of the girls birthday party that we didn't invite her to because of the staph infection. We kept it a secret so that my grandmother's feelings wouldn't be hurt. What gain does Melissa see in making my grandmother upset that she wasn't invited to the party? Making me look bad? At this point I give up, there is no arguing or explaining to these people. They are just malicious and ignorant. I pray that one day, my grandmother is able to see the light.
The best part of the whole situation, they are all two faced. Melissa leaves me a message on my voicemail yesterday afternoon, saying that she would love to get together and see the girls. Haha! How can she act as if nothing happened at christmas and that she doesn't feed my grandmother lies about me? Is she serious? Maybe she's just crazy....