Ready to feel really old? It’s been almost a decade since we first met Maci Bookout on 16 and Pregnant! Fans were reminded of that this week when her son, Bentley Edwards, had a big birthday.

The Teen Mom OG star’s firstborn — whom she shares with ex-fiancé Ryan Edwards — is celebrating his final year of single digits on Friday, Oct. 27. To celebrate her baby turning nine years old, Maci shared a sweet eight-photo montage of the growing boy through the years. She captions, “Go Benny, It's your birthday! ?9️⃣ ? Happy Birthday to my 9 YEAR OLD! I am so blessed to be his momma and could not be more proud of the amazing young man he is! Love you Benny! ❤️ #bennybaby.”

It’s crazy to think that when viewers of the MTV show first met the Tennessee gal, she was still pregnant with Benny. And now, he’s already in the third grade! In fact, his mom shared a pic of him ahead of his first week back at school in August. “My big 3rd grader! Ahh ??? #bennybaby #thingsthatmatter,” she gushed at the time. He’s also keeping busy at school, playing multiple sports including baseball, football, and cross country!

Bentley is clearly not a little kid anymore, but luckily, Maci still has two adorable toddlers to keep her hands full. Daughter Jayde, 2, and son Maverick, 1 — whom she shares with husband Taylor McKinney — are still tiny enough to make their mama swoon. Earlier this month, she gave an update on the two. “Oh my heart!” she wrote alongside a pic of the siblings cuddling on her chest. “When ur babies love each other and their momma.”

With kids as cute as these, why wouldn’t she want more? But despite recent pregnancy rumors, the 26-year-old has made it clear that she doesn’t want any more babies. “Oh, no. I’m done,” she confessed this year. “I think for me, one, I don’t want to be pregnant ever again. I hate being pregnant…. I think just by adding more it takes more and more time and attention from the other kids.”

That said, there still may be another addition to their brood in the future! The McKinneys have mentioned the idea of adoption in the past. There’s no reason they wouldn’t consider that going forward!