I realized how to parse this sentence after the fourth or fifth go-round (it's my brain, not your sentence!) and before that thought Good heavens, if S had taken up with a dragon, surely S would tell me and having put the thing together properly, I think Niece will love the stickers. Niece's collection and variety of dragons is deeply impressive, even to Child, who is a bastion of sophistication at 11*

*and won't let us give away their own dragons