Although some WikiTree messages imply that our watchlists consist of our relatives, that isn't necessarily true. We are not automatically added to the trusted lists of existing profiles for our relatives. You can submit a request to be added to the trusted list for this profile; there's a link for doing this under the "Collaboration" heading on the righthand side of her profile page.
Because you are still a "Family Member" of WikiTree, you cannot edit Margaret's profile without being on the Trusted List, but since her profile has Open privacy, you would be able to edit it and connect other family to it if you upgrade your membership by signing the Honor Code.