Am I a ***** for finding gran creepy?

My mom has bipolar and is really badly manic but I am only 15 so I have to stay with my gran, her mom. But the thing is she badgers me constantly! She seems to think my name is Baby, not Angelika or even Angie. Constantly she calls me baby. Also she will not leave me alone, constantly hugging me and, disturbingly to me, squeezing my backside. She has piled the spare room high with stuff for her charity so I have to share her room. The breaking point came when I was in the shower and she came in saying HI BABY and stood staring at me. I went to my mother in tears she said that I could not go back to hers as she has a bad temper and does not want to hurt me when she loses it. My mom is also freaked out but I feel bad.. does anyone else find it creepy?