I am so sorry about your dad.
This friend/person needs to realize that her needs or what seems to be important to her in her life at the moment is not what is as important to other people. A real friend would realize this and would understand. I am sorry that this person doesn't feel this and is putting this extra strain on you and your father/family.
Like sekmut said; Have you told her to go away? Or just that what seem important to her is just not all that important to you at the moment. You realize that she is having a difficult time, but does she *REALLY* realize the same about you? Besides, with the holidays and everything it always seems more stressful for everyone.
Hang in there.
*Big Hugs*
Brightest Blessings!
