The then single mother of Ricki, now 10, chose to stay celibate before the big day.
"I knew the person I would wait with was going to be my husband," Maynard tells PEOPLE exclusively in this week's magazine.
"I always knew after [having sex in past relationships], this is not right. I'm not supposed to be doing this. I felt like I had broken God's heart so many times before, by all the times I'd messed up and done things God would be sad about. I just wanted to do something purposefully so I could show God how much I love Him by obeying his word."
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And Maynard, 30, whose new book about her life's journey, I Said Yes, is on stands March 1, says the decision to wait made her relationship with Johnson even better. (The pair are now welcomed son Jennings, 7 months).