['When my younger sister got pregnant, all I could think about was her as little baby.  It was a trip.', 'Did you get a little baby crazy?', 'haha not at that point!  a little, after I met my niece', "My sister is actually pregnant right now but, I'm not supposed to know about that yet.", 'Awww, congrats!  I absolutely love having a niece.']
I'm excited. She's been trying for a couple of years.
When my little sister got pregnant, all I could think about was out childhood.  I remembered her as a little baby, and it seemed crazy she was going to have one of her own.