I'm very happy for you!! It's really cool that your mom didn't blow up at you or start preaching to you. I don't know you or your family but my hat is off to you for having the courage to let her know that you don't believe the same as they do. Whether she believed you or not, all you can do is tell them how you feel. It's their choice if they want to think you're joking or not....
"You're basically killing each other to see who's got the better imaginary friend"-Richard Jeni
"Give a man a fish and he will eat for a day; teach a man to fish and he will eat for a lifetime; give a man religion and he will die praying for a fish."-unknown
"Give a man a fish and he will eat for a day; teach a man to fish and he will eat for a lifetime; give a man religion and he will die praying for a fish."-unknown