Mormonism is a big thing for those who follow the faith, so Sundays and the occasional event depending on how much she does extra might distract her. Sexually, risque and the such is essentially the same as baptists and fundamental Christians.
Her Religion is more important than you will ever be Her Religion comes first and deep down, she will come to hate you for not accepting joining her religion.
Going back in time, it was never encouraged for people to marry outside their faith and this covered most christian religions in the United States. Catholics basically married catholics and protestants basically married protestants.