Thanks guys. I really appreciate the advice. I can't say goodbye in the mornings because DD is still asleep when I leave. But I will definitely start telling her where I'm going from now on. Maybe her sleeping patterns will change soon (I think I need to start a new thread asking for advice on how to deal with a night owl) and she will be awake when I leave for work.

Audax, thanks for your advice. When the time comes for her to go to daycare or kindy I won't sneak away.