It looks to me like momma duck is smiling! She looks very proud of her family! SOOOO CUTE!

Edited to add... when I worked in Westmont, we had a pair of geese who built a nest. One year they built it on a little "island" in the parking lot. The mother sat on that nest in the worst weather. The property manager put a barricade in the nearest parking spot so people's cars wouldn't scare her. We said they did the right thing putting their nest in a spot where it would be watched by a bunch of nurses every day She did fine and we got to see dad, mom (we named them Gander and Mother) and the little ones wandering around the parking lot and off to the retention pond. The following year they put their nest within a row of hedges at the side of the building. That was better because we could keep an eye on them through the window, and because they were a couple of feet away from the curb. The third year a new property manager came in and chased all the geese away. We missed them.