<human>: Can you provide a brief overview of the text?

My grandmother died this Thursday so now my family (my mom, brother and I) are faced with either going to the funeral and facing serious drama or staying and seeming like we are defeated. Why do we feel defeated, you ask? Here's the story.

My dad left my mother of 27 years to go and live with his girlfriend. He abandoned my mom, younger brother and I to go and live with her, all while not paying child support for awhile and stuff. Basically, my grandmother at first thought that it was somehow my mother's fault, even though my father has struggled with depression.

After awhile she figured that it was really my father who was wrong, but then my father kept trying to turn his mother against my mother, saying that it was her that pushed him awhile and stuff. Grandma didn't buy it and dad kept trying to bring his new girlfriend into her life, even though my grandma was already sick with two types of cancer and was dying already, possibly from the stress of my parent's nasty separation. 

My father has decided that he is going to bring his girlfriend to the funeral for "support", even though he could use his sister as support. My younger brother has decided that now he does not want to go because of said girlfriend, and I do not want to go either because if I see her, I will kick her teeth so far that she will think twice about her decision to ruin my family.
<bot>: My father left my mom, brother and I for a new girlfriend and will probably be bringing her to my grandmother's funeral - I would like to avoid drama with her at all costs even though I want to kick her teeth in.