Maci Bookout Wishes Son Bentley a Happy 8th Birthday: 'He Will Always Be My Baby!'

"He has grown into an incredible young man," she said of her son in a sweet Instagram post on Friday

Updated on October 28, 2016 04:41 PM

He may have just turned eight, but Maci Bookout‘s son Bentley will always be her “baby”!

The Teen Mom OG star took to Instagram on Friday to share a sweet snapshot of the mother-son duo from their day at the pumpkin patch and to wish her oldest child a happy 8th birthday.

“Happy Birthday Bentley! We spent the day with his friends on a field trip to the pumpkin patch and then had an awesome dinner with friends and family!” the caption begins.

“I can’t believe my baby is 8 years old, he has grown into an incredible young man, but he will always be my baby! I love you Bentley!” Bookout writes.

Bookout, who recently wed husband Taylor McKinney at a sprawling Florida location that they had teased during a recent episode of Teen Mom OG, was one of the original stars of MTV’s 16 and Pregnant, which documented her early years of raising Bentley with then-beau Ryan Edwards.

The mother of three and McKinney, 27, got engaged in January — just one month before announcing they were expecting their second child together, son Maverick Reed. They also share a daughter together, 1-year-old Jayde.

Earlier this year, Bookout told PEOPLE that Bentley “thinks the world” of his baby sister Jayde. “At this point, he’s really a huge help. He likes to feed her and help change her and bathe her. He’s wonderful. [His help] has been really nice and made the transition into parenting two children much easier. It’s awesome to see him so involved and, really, in love with her.”