You and your dad has a wonderful gift of your mother's pillow, I lost my mother in 2009, and I am still having trouble with it. I started making crazy quilt pillows for my 3 brothers, my daughter, my grand daughter, three nieces, and my self out of some of my mother's clothes. I had someone say they didn't want one, so I got discouraged, and haven't finished the rest of them. I don't know who said it, so..........
It is very nice of you to do one for your dad, and I hope you made one for yourself, too. Just keep your memories in your heart, and she will always be in your heart.