Wrapping the towel around herself, Liz picks him up.  "Well thank you, honey.  I'm glad I meet your approval.  But I do have to say...no fair biting me, ok?  I don't have all the mouths to bite you back with.  And if someone can't do what you can, you need to be more careful with them..."  It's hard to know how to instruct this little one.  She doesn't want to upset Xy, doesn't want to make her child's life harder by giving him rules that will harm him.  But at the same time, she doesn't want him to be a ruthless killer.  Hopefully having some human blood in him will help edge against that, though seeing how some people treat each other, she isn't sure of that.