Ah, bless her! She is adorable and I am glad things went well.
It is hilarious when they tell you to keep them quiet for so long. Our vet tech gave us that same spiel and then she laughed and said obviously that wouldn't happen (kitten with two very active brothers...) and just told us to keep an eye on her and if she was acting abnormally after a few days or if she was excessively involved with her stitches then to bring her back in. Luckily, we didn't have a problem.
I am sure there are some internal dissolvable stitches as well. Our vet did all dissolvable stitches on Conor since she found the vet experience quite traumatic (former feral). Here's hoping that your sweet little thing recovers just fine! I am sure she will.