The short answer, I believe,is yes...but you'd better (almost literally) keep her attached to you with a tether cord while she's OC-ing.
There's been more than one discussion of this on the OFCC forums, concentrate your search in the 'Open Carry Discussion' section, but keep in mind that part of their board is relatively new.
Also, you likely know how to find the relevant sections of the ORC on this subject.
One more thing: Is she willing/responsible/competent enough to carry a gun? That's not intended as a sleight, carrying a gun is more than a political statement,and NOT supposed to be used as a bluff against possible attack.