Natalie needed Eleanor isolated and pliable before the wedding, because the wedding would make Natalie family, and family gets access. She needed to be positioned, when Eleanor’s mind was at its foggiest, to guide her toward “updating” the trust — redirecting control, adding Natalie, restructuring who inherited what.
But she couldn’t do any of it with Elena in the house.
Elena, who organized the medication and knew which day was a good day and which was a bad one. Elena, who would absolutely notice a stranger’s financial advisor sitting with a confused old woman and a stack of documents.