Originally Posted by
ladyamalthea 
Apparently this did not go over too well, as I never got a response back, or even so much as a phone call.
If your goal was to stop conversations about your sister then it sounds like you got what you wanted. Your mom may not know any other way to communicate with you at this point. Give her some time because she's been doing this for a while, right? While you're waiting for her to switch gears, maybe you can try sending emails with the things you want to talk about. She might need a little help with direction.