Oh those pictures are so cute!!
Sorry to hear that you've been so sick, what timing but hey at least you go to stay home with the newbie!
I think Toby may be jealous and that is why he may now be growling at you too. I always heard to give your kitty lots of extra attention and lovies what you bring a new one into the house. And to never get mad if he hisses at the newbie...
Maybe he feels betrayed seeing Lily in bed with you and being looked out? (Of course I am not saying that you HAVE betrayed him!!!)
Just give him extra lovies and attention and he should feel reassured. Kitties are emotional creatures!