My baby is gowing up so fast:(

This was on Valentines day, she thinks she is such a big girl. She is laughing now and it just melts my heart. She is absolutely the best medicine for a crappy day at work. When I come home and she smiles at me you can't help but smile. I heard somewhere that a baby's smile is contagious and that is so true. How can anyone not smile when a baby smiles at you.