Oh poor, sweet Ally. If Connor punctured her leg, it is most likely it has abscessed.
I'm so sorry to hear they are not getting along.
Is it possible to keep Connor seperate from Ally, by keeping him locked in a room or will these be too much for your cat-sitter to deal with.
All in all, I hope you are able to enjoy your vacation and come to a conclussion on what to do with these two, when you return home. Of course, Ally is your first priority.
Wishing you all the best of luck.