I am so glad to hear that Ally will be fine soon!!!

It should be no great deal for the cat sitter to keep them apart and so both can stay in their familiar environment, while you are away!!!
I hope you'll find the time to relax and enjoy the holidays...and when you return home it will be easier to deal with your felines again...sometimes it's good to get away from all the problems for awhile and take time to rethink it all...

But most important take time to relax and be happy!!!

Best wishes and {{{{{HUGS}}}}} to you, Ally and Connor