<P> The next morning, Lily tells Marshall she sees now that he is ready for a baby, as he took care of her so well . Marshall says he isn't ready to balance work and children, and suggests they decide to wait a bit longer . </P> <P> As the episode ends, Barney is seen at the karaoke bar, tearfully singing "Cat's in the Cradle" while holding the sock . </P> <P> The episode had the title "Jeremy's Sock" but was changed to "Not a Father's Day". </P> <Table> <Tr> <Td> </Td> <Td> This section needs expansion . You can help by adding to it . (December 2015) </Td> </Tr> </Table>

How i met your mother cats in the cradle