It's not that she doesn't believe you right now, but it is a bone she will never drop.
Follow your heart and live life with no regrets. I was the bishops' daughter who went to BYU but didn't go on a mission because I was already married with a 10 month old by my 21st birthday.
But on the main page of exmormon Reddit on the side bar there is a link to a site with links to all the pages on LDS.
Helpful way to learn the facts in a fast and funny format.