+1 on dropping her, and drop the bank for a credit union.
I had some ladies dog bite me back when I worked for another company. I was heated! They're lucky you're probably a kind hearted dog lover like me and don't sue or complain to the town. I've heard in a lot of places if your dog bites someone three times, they'll make you have it put down. Not that you should act on any of this, trust me, karma is intense. But if it was your dog sitting in the truck while you mowed, that bit her, it'd be a different story! While I think bad dogs are rare, bad/stupid dog owners everywhere.
Try to explain yourself so as to not leave a bad taste in her mouth (some kind of excuse other than "because you're a pain in the ass") and move on.