Teen Mom's Maci Bookout still can't believe her son is a full-on teenager. "How is my Benny 17 years old? Happy Birthday @bentleycedwards," Maci, 34, wrote via Instagram on Monday, October 25. " I Love you beyond measure! 🥳🩵🙏#bennybaby #sweetseventeen #happybirthday." To mark the celebratory occasion, the MTV reality star shared new photos from a recent family photo shoot. In pictures captured by Brianna Merritt Photography, Maci tried to carry Bentley along the beach.