THE CHIPMUNKS MOTHER

Eventually, the Chipmunks go searching for their long-lost mother and after days of a treacherous search, actually manage to find her! At first, everyone's happy, but eventually Alvin gets upset since he doesn't understand why she abandoned them. Their mother explains that the year she abandoned them there was a horrible winter and all of the animals in the forest were forced to leave their homes because of it. The fact that they were so young, forced her to realize that they wouldn't survive the journey if she brought them with her. So instead, she decided to leave them with a nice man who was always kind to the forest animals (Dave). She said, "Giving up her babies was the hardest thing she ever did," and then told them that when spring came and she could finally return to get them, she saw how happy they were with Dave, and thought they'd be better off with him.

Eventually, Alvin forgives his mother, and they all part ways on a good note: promising to keep in touch.