The former "The Bachelorette" Season 8 star confirmed she's pregnant in an Instagram post Tuesday, saying she "can't wait" to welcome another son or daughter with husband Tyler Johnson.
"Way too many tacos at lunch," Maynard jokingly captioned a video showing her baby bump.
"Seriously though, as scared as I am to have 3 under 3, I'm so grateful God picked me to be the mommy to my kids and we can't wait for number 4 to get here!"
"This pregnancy has been filled with lots of hot wings, ranch dressing, an emergency appendix surgery at 6 months, and swollen ankles all day every day but I wouldn't change it for the world," she said.
"My little tribe can't wait to meet their new brother or sister (it's a surprise!) in the next couple of weeks!"
Maynard shares 2-year-old son Jennings and 11-month-old son Gibson with Johnson, and 12-year-old daughter Ricki with late fiance Ricky Hendrick.
She told People in December that she and Johnson wanted more children.
FOLLOW REALITY TV WORLD ON THE ALL-NEW GOOGLE NEWS!
Reality TV World is now available on the all-new Google News app and website. Click here to visit our Google News page, and then click FOLLOW to add us as a news source!
"I definitely think we'll have at least one more. [My husband] wants two more," the star shared.
"Ricki likes to take [Gibson] for a walk. She likes to push the stroller. She likes to pick out his outfits. And she's really into decorating onesies," she added.
"It's really cute. I love to see [Gibson] and Ricki together. She's such a little mommy. She's so protective of both of her brothers."
She couldn't help but gush about Johnson on their third wedding anniversary.
"Happy anniversary to the person who has changed my life in the all the best ways," the star wrote June 7. "Nothing makes me happier than knowing you are a part of God's plan for my life and I couldn't love you more."
Copyright 2017 United Press International, Inc. (UPI). Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.