Well, we've made it through to dawn and we still have two kittens. She's much more lively now (unlike me) so that's a bit of a relief. I'm a little worried that she has some nasty disease, she is much smaller than her sister and has always been the sickly one. They have just had vaccinations, I hope she didn't catch something before them.
Staying up all night was easier when I was 10 years younger and doing it for fun, only 10 hours left and I'll have finished work for the day...