I'm so excited for Castle, but I am so afraid the show will break them up soon. Got anything to make me feel better? — Erin
ADAM: Creator Andrew W. Marlowe promises there will be an "interesting honeymoon period," during which the new couple will feel each other out about how "real" the relationship is. (We said feel each other out, pervs.) But yes, there will be obstacles — most notably Capt. Gates and that little NYPD rule about partners not being romantically involved.
Source: TV Guide