Yeah, I think it's dedicated to her mother (which is why I accidentally called it Mother originally... oops
), but I don't think that makes it any less likely to be included. They might not include it for some other reason, I'm starting to feel less certain about it for some reason. Kibou no Wa, Otoshimono and Kataomoi are a sure thing though. I wonder if they'll include the ballad version of Delight or record ballad versions of some other songs?