I think you should call her and explain the need for more fabric or t-shirts and get a better idea of what she wants. I went through the same for a co-worker who lost her two-year-old granddaughter. I made one quilt for her and one for her son and dil. We talked several times during the initial stage and she looked at the blocks as I worked along and made changes/additions to the fabrics (I think she changed the border five times). I needed to keep talking with her, I just couldn't be responsible for that personal a project on my own. I know anything I did would have been loved and I don't mind the work, it's just that (for lack of a better expression) I am NOT the decider, that is what I would tell her, anyway, hee-hee.