nobody can know how they actually felt. however:
1. jane refused to crown him king. when guildford realized that he ran to his mother to complain. not very affectionate behaviour there...
2. jane refused to see him the night before they died, although she was granted the right. ok, maybe it would have been painful, but so is knowing you're gonna die! isn't it much easier to spend the last moments of your life with someone you love?
however, calling your mother 'jane' is also unlikely especially in those times, so if guildford had wanted to carve his mother in stone maybe he would've carved 'mother' or something. maybe he wasn't the one who wrote that, i don't know...