"I don't need your love or support at this tragic time @sarahjessicaparker," Cattrall said in an Instagram post.
"My Mom asked me today 'When will that @sarahjessicaparker, that hypocrite, leave you alone?' Your continuous reaching out is a painful reminder of how cruel you really were then and now," she added. "Let me make this VERY clear. (If I haven’t already) You are not my family. You are not my friend. So I’m writing to tell you one last time to stop exploiting our tragedy in order to restore your ‘nice girl’ persona."
Parker recently admitted she was "heartbroken" over Cattrall's comments that the two were never friends.