I agree with Fabric-Holic! When those WIP don't see the light day for some time they become a UFO. I also have several.
As for the quilt your Mom and you started, I understand your feelings. My Grandma taught me alot. When she passed I was given alot of her stuff. I use it and I can feel her with me. Heck, I even talk to her when I am stuck. Suddenly, things just come to me.I strongly believe that she helped me.I find this comforting.
Maybe, if you work on this quilt you will feel comfort instead of pain.Best Wishes to you!