if you couldnt talk to the parking dude at the time, i wouldnt bother about it, fines been written and done, $70 is like a full tank, but not really worth the worry and bullshit you have to go through to cancel it.
or you could exaggerate the situation, saying you miss's was curled up on the front seat with bad pains, so you did what any boyfriend would do, and that asshole inspector didn't even care to see if she was alright while you were gone for all of 1min max.
give it a crack either way, the worst that can happen is that you pay your $70