I appreciate everybody's replies on this. My mom has ceased from ragging me about it. I was able to fend her off from "Have you thanked [sister] for the gift yet?" with "Not yet". But its been 4 days or so since she asked. A chick I know had a pretty good idea. She said "Don't call your sister. Don't text her. Don't unblock her. Send her a generic 'thank you' card in the mail". I pondered over that idea too. But in the end, I decided to do nothing. I just can't get past that horrific night in 2012 when I was at the lowest point in my life and my sister treated me like a piece of trash. Thanks again for all of the replies.
