I did for my brother's recent funeral, in a faraway land, at the request of his widow. Caused a drgree of excitement amongst some of the mourners and featured in the local media as he was a bit of a local 'wheel'.
I think it's a bit of a strange one to a degree, but as everybody else says, it's your mum. Again, if it was dad, brother etc same thing. If she was proud of your choices in life, then make her proud once again by wearing them.