Knight, 47, and 23-year-old Curry became an unlikely couple when they started dating after meeting on the set of their reality show The Surreal Life last year (04).
And while their relationship has gone from strength to strength - and they've filmed their own spin-off reality show, MY FAIR BRADY - licensed couples therapist Henderson, who played Knight's mother in classic series THE Brady Bunch, is far from enthused.
Curry says, "She doesn't like me. She got to know me for about an hour and says that if (Christopher and I) stayed together in a house, our relationship was doomed.
"Just because you believe something doesn't mean you have to act a certain way or say something to hurt somebody."
Knight notes, "Florence has known me my entire life. She's sort of a mother figure. She's very bright...
"I guess our Christmas party will be very interesting."