I'm quite sure that the Hermes Kelly is real. Yes, she has carried fakes in the past but she doesn't need to anymore, her husband makes a lot of money (and so does she through sponsorships etc).She has been outed as buying fakes so, so many times before - why would it be different now?
The fact that she only has one Hermes bag points to it beeing real. If it was fake I think she'd own a bunch of them.