Do you talk to yourself?

Oooo my mother talks to herself. She always has done. The problem is, she isn't quiet about it AND she mutters away about things that others have done to annoy her. Because she is talking to herself, she can get really nasty. Many times, myself or other family members have overheard her muttering, only to find out she is b*tching about US! My daughter, in particular, gets really annoyed by granny being nasty about me. My mum DOES have reputation for being a vicious old bag. The nasty muttering only adds to it.