Sorry to post another thread but I have one more question for you pros 

About six months ago my dad died suddenly.  I was engaged after and asked my godfather to walk me down the aisle (My dad's brother). 
Several people have asked who's walking me and been horrified that I didn't ask my mom.  Is there a protocol to this that I missed?
One even went as far as to tell me "NO, your mom needs to walk you"