Nick (Younger Brother)
Catelynn Lowell-Baltierra is a junior in high school, living in Algonac, Michigan. She and her boyfriend of three years, Tyler Baltierra , discover she is pregnant. Neither of them feel that their living conditions are suitable for a new child, so they decide to look into adoption, going against their parents' wishes. They settle on a couple, Brandon and Teresa, and bond with them quickly. In May 2009, Lowell gives birth to a baby girl, who is named Carolyn Elizabeth (Carly for short) by her adoptive parents. Although not initially wanting to meet the baby, Baltierra and Lowell decide that they would like to see Carly before her adoptive parents do. After meeting their daughter, Brandon and Teresa promise to keep in touch with Baltierra and Lowell throughout the years of Carly's life. When it is time to sign the adoption papers, Lowell's mother refuses, forcing the official handover to take place off hospital grounds. Baltierra and Lowell say that the adoption was the hardest thing they had ever had to do, but the result has brought them closer together, and they know they made the right decision for Carly. Since then Catelynn and Tyler have become engaged. Her and Tyler are now married.
Catelynn struggles to adjust back to her normal life after her emotional decision to place Carly for adoption. Catelynn has been kept on an integral part of the show, to let prospective teen moms know that there are other options and that one can go on and still be a "birth mom" while being completely mature and selfless. The adoptive parents are Brandon and Theresa. Catelynn moves back home with her parents, but learns that her stepfather, who is also the father of her boyfriend Tyler, is not over her decision to place her daughter for adoption. During the season, Catelynn comes to terms with being a birth mother, moves in with Tyler and his mother when her mother and her stepfather move into an apartment in another city, and gets engaged to Tyler. She and Tyler both get tattoos in honor of their daughter.