Katharine McPhee teases future stepdaughter Erin Foster while on vacation with fiance David Foster
Erin jokingly commented on a photo from her father and his fiance's vacation saying she would have liked to go along, to which Katherine replied, "Mommy and Daddy need alone time."
Katharine McPhee, 34, and fiancé David Foster, 68, are really milking their pre-marital bliss, enjoying a vacation together in Stuart Island, British Columbia, after their incredibly romantic engagement in Italy. McPhee has been posting spectacular photos from their trip, which seem to have caught the attention of her future stepdaughter Erin Foster.