Well, she wasn't entirely surprised that her spell didn't work. After all, it took her about three times for something to work. Thank goodness this was not Quidditch's case.

"Together...on the count of three to your lock, yes?" yes, alright. "One...Two...Three" she said, and the flicking of the wands began again, "Alohomora!" she said, focusing all she could on Abby's lock. Maybe this could work?