Seeing this as a chance to have the kind of caring brother-sister relationship she never had with her real brother, Rikki befriended John.
While they didn't get anywhere, he's still thoroughly squicked at the situation.
The rest of the episode has Peggy making sure Joseph and Kate don't, um, explore a deeper relationship.
Smith and Wyman were married at the time, giving Smith a narrow escape from becoming her own step-granddaughter-in-law.
.
Not only was Cavil designed to resemble Ellen's father, she had also viewed him a son.
MacCartney from suicide, since he believes he fell in love with his sister.
She denies it, but it is heavily implied both that she actually is his mom and that she already knows this to be true.