My great-grandma is really annoying?

So we just moved in with my 93 yr old great grandma. Please don't judge me, Im not saying I hate her, but she is really annoying. I know, I know, "shes 93 years old, get a life!" before you say that listen to the story: So we have 3 cats, and I am scared to death she will walk out of one of the sliding glass doors (she's a real nature lover) and my cat (the youngest) will fly out he door and she has no clue. I love my cats soooo much, and I would hate to see them run away all because of her. She also bought a begonia (not sure how to spell it) which I heard is highly toxic to cats,so we told her to put it in her room up high so they can't get it, and guess where she puts it? On the side of her bathtub. Well thaits a huge problem because they love to nap In her bathroom. And earlier tonight we were talking about possibly getting a dog, and what does she say? "Ive had enough of cats and dogs!" so she techncally said she doesn't want the cats. But she leaves her room door open, and she says she doesn't want cats in there. She also disrespects my privacy. I'll be on the computer talking to my friend, and she'll walk up and start breathing in my ear looking at it. She also does it to my mom when she's on facebook. We can't tel her to go away because she'll say "why?" and start a big thing. And she can't do anything for herself.she is in good health and is perfectly capable of taking her dirty dishes to the sink. Once or twice of me taking them for her, but over and over again "Madison, take my plate to the garbage sweetie" but its so rude and annoying. "Madison, make me some green tea!" my mom had a graduation party today and my mom ended up getting her food for her and cleaning up. It was rediculous. I was telling my mom that I will eventually kill myself and mymom agreed my grandmas annoying. And yesterday, once or twice of helping her with the tv is ok, but she said "turn to my channel" and I had no idea , and she dint give me any info. Guess I'm outta chars srry