Hey all!
Just wanted to say a huge thank you for everyone for their lovely wishes. Lili came through the surgery okay, but we're nowhere close to being out of the woods. It was around 48 hours post the original op when the signs of infection set in, so I guess you could say we're in the danger zone now.
We've just been for a check-up and the vet who operated yesterday told me that when they opened her up they found that all the stitches in the muscle wall were intact, so it seemed that they had just come through the muscle itself.

They're not sure if that was because of the extent of the infection that weakened the muscle holding the stitches
OR if it was because of a reaction to the stitches themselves.
The vet said that there's no much room for alteration on what sutures they use so it could happen again if it was a reaction, and obviously that'll mean another surgery, so I'm terrified of what might happen over the coming days. Poor little mite has been through more than enough already, she deserves to catch that full recovery already.
Anyway, I thought you all might like to see a little snap of her from this morning. (Excuse the big blue collar, we had to find an alternative to the cone ones, because she wouldn't even lie down in those!)

Luckily she seems no worse for wear after the surgery and she's eating/drinking okay and almost back to normal with being a little bossy boots. I'm a bit concerned about her toileting as each operation seems to upset that a bit more and we'd only just got back to rights after her spinal operation, but fingers crossed for no further problems in that department, or any other haha!
Once again, huge thank you to all you lovely people who replied with such kind wishes. I'm certain your energies help get us both through these dark times! Please keep her in your hearts in the coming days, as it'll be a while yet before we know if she's beaten this or if we're headed back to square one.