I'm sure there's nothing all that significant to how quickly Tedd's on board with accepting Pandora as a godmother.
A big part of the issue with naming this part of the storyline (which I wound up calling Great Fairy Godmother) is that that's sort of not a thing? I don't think? Like, if a family has its own tranditions and rules, it's as good as a thing, but still. I don't think Pandora being the mother of Tedd's godfather technically makes them anything to each other as far as commonly used titles go.
Of course, you may have noticed there's a lot of the word "think" in that paragraph, meaning I'm not 100% on any of that. Pandora would know better than me, which is one of the reasons she gets interrupted by Tedd before she can elaborate any further with expertise I do not have.