Yes, it looks like, but in this one she took it to the extreme. But it could be referred to show the extent of the battering. As she said
"I killed him because he never stopped insulting and maltreating me he had totally obliterated my personality our dispute had reached a dead end after he refused to divorce me, which left me with no choice but to kill him." So, to her, the only solution to leave him was to kill him.
As the professor said it shows how she has been under strong psychological pressures. Battered woman syndrome is in deed a psychological and behavioral symptoms caused by prolonged exposure to situations of intimate partner violence. Due to the subsequent extreme things she did, i.e, cutting his body into pieces and feeding it to the dogs and cats, people will usually assume that she was suffering from diminished responsibility, thereby avoiding to address the problem of battered women syndrome which may have made her to totally loose her self control