We thought the nest was empty, but still didn't mess with it. To our surprise, not more than a minute after depositing her baby, she was back at the old nest...and...pulled out another baby! We were all shocked because we didn't see anything else in it! We watched her run up the other tree and drop the baby in the nest and were all just in awe of the whole thing.
Here's the weird part - she kept going back to the old nest...over and over again. We're not sure if she was taking pieces of it up to her "new" home or what, but when I came into work this morning, the nest was unrecognizable as a nest. She had tore it completely to pieces.
A couple things amazed me about that mama squirrel...she didn't spend any time at all looking for a new place for her kids - she IMMEDIATELY took them to an old nest, so squirrels must know where all the nests in the area are and if they're occupied or not (there were 3 nests much closer that she didn't go to). And she had no hesitation, no fear of us at all, either time she came for her babies. We gave her space, but there were 4 of us no more than 10 feet away. She didn't care. She had a mission.