Board Thread:General Discussion/@comment-4287993-20170516070506/@comment-4287993-20170903073130

Stepsiblings are always only related through marriage, unless there's some incestuous relationship going on.

I really don't like the idea either because Richard definitely considers Maggie his daughter, so it must feel weird to Richard and Catherine if it happens. However, cast interviews already made it clear that April wasn't necessarily right so I am really, really hoping that she was not.