I'm happy to say that Lily has been quite playful, and the middle child, Evie, has overcome her fears and will sit on the floor and play, even giggling when Lily nibbles a toe. The youngest, Emily, is content to just sit and watch. She's still nervous about her, but has let Lily lick her hand... so it is coming along slowly.
Lily is a wiggly, wrinkly, snarfing, handful of cuteness. She's also well on her way to being housebroken!