The owner of the Palmer house says her name is Tremond; this is also the name of the old lady (and her grandson) from Coma (1990). The same old lady used to call herself "Chalfont". In Twin Peaks: Fire Walk with Me (1992), Harry Dean Stanton's character Carl says that before the Chalfonts, another family named Chalfont lived in the trailer.
This could be a hint that the unseen husband is possibly Pierre (Miss Tremond/Chalfonts grandson).