It's kind of sad that Mew and Mewtwo never seemed to reconcile their relationship as mother and child in any real way over time. The first movie basically just pitted Mew against all clones, and Mewtwo was the opposite, and had them in a deathmatch until Ash got "stoned." After all was said and done, Mew never showed any true realization that, despite the circumstances that led to it, Mewtwo is her son (and he accepting that she gave him life). Pretty irrelevant after the 12 odd years since then, but it's a thought that kicked back in recently and I felt voicing.
Maybe I missed something in some of the other films (I only ever saw the first one). If I did, let me know.
"All your sweetrolls are belong to me." Video play throughs at - http://www.youtube.com/user/DreadArkive