Board Thread:General Discussion/@comment-37879183-20190206030000/@comment-37166538-20190421003832

True, they've never almost kissed. But I do think that the FANDOM user is right in saying that it would be a little odd to write parts into a tween/kids series where relatives have crushes on each other. Even is Sophie doesn't like Keefe (which I will address in the next paragraph),  Keefe likes Sophie for sure. That's canon. Confirmed, in the Keefe POV.

One more thing, though, it's more than a simple "theory" that Sophie likes Keefe, seeing as her heart gets all fluttery around him, just like with Fitz. True, she doesn't admit to liking Keefe (yet), but you can't deny that there's something there.

Point being, I do agree that it would be weird to make Sophie and Keefe related. But who knows what Shannon Messenger has in mind?