but make sure that you remain not only the man she married, but become a better man than you were before
let Islam's good influence upon you be your method of invitation to her, but be warm and patient like a still pleasant lake with her
PS. Definitely avoid ever giving her the books of Ahmed Deedat, they are not suitable for giving to Christians they are for arguing with Christian Missionaries etc. InshaAllah when she eventually gets round to asking you more about Islam you may benefit from the books and dvd's of Harun Yahya, they are attractive and non-challenging, likewise Fethullah Gulen and Said Nursi (ra) both have a lot of pleasant and non-challenging books published that you may benefit from.