Oh I do so understand about the incision coming open over the weekend! It happened to us with a Shep/Lab, and we were so worried...took her to the ER on Sunday and back to her vet on Monday. We thought they'd stitch her, but they (ER) didn't even put a butterfly over it!
Fortunately, we had some and put them on ourselves til we could take her back to her vet...as 'they' advised...first thing Monday morning. I couldn't believe the lack of concern for my baby girl.
I hope there are no issues for you this time and certainly not for Jazzie!
Our best wishes to you and Jazzie for everything to go perfectly and that you have no need to stress or worry.