Thanks for your replies, ladies.
Even without my mother's email, I would (and will be) emailing my dad my thanks and telling him my thanks in person this weekend. It makes me sad that my father doesn't know the difference between the real me vs. the me I will have to pretend to be over the weekend, but I will put on a big show for the sake of my mother who has to deal with the fallout from him and my sister when I'm 'bad' and don't do what they want me to do in the way they want me to do it. This is one incident in a long long line, so I wanted some unbiased perspective on this particular incident and, thus, posted.
I guess the greater issue is that it is frustrating and hurtful to me that I am expected to put forth the effort to fully understand them in every way and meet all of their emotional needs and wants, and my father and sister neither understand me, care to, or bother to try.