Why does my aunt keep calling me every freaking day since my grandpa died?!

Ever since last Tuesday when my grandpa died, my aunt had been calling me asking me how I’m doing! She keeps asking how I’m holding up. I keep telling her, “I’m hanging on here”. I know she cares about me and I’m grateful, but I am getting a break my last nerves!!!! I wish she would stop calling me so freaking much! I get I’m her favorite niece but she needs to stop! She doesn’t call my brother and sister this much! I keep telling her I need time to grieve. She said she understands but it isn’t good to be alone all the time and she’s lucky to have a family that cares. She was saying something about coming over every couple times a week to check up on me. Dude I’m 21, NOT 13! I live with my mom’s sister which is my other aunt. She did the same thing when I lost my parents.
If she calls me again tomorrow, I’m going to let it go to voicemail.