Watch: 'Teen Mom's Catelynn Lowell Responds to Claim Tyler Baltierra Faked Autism DiagnosisCatelynn Lowell Baltierra's family is carrying on a tradition. The Teen Mom alum's 19-year-old brother Nicholas Radtke revealed that he and his girlfriend Emma Smith are expecting their first child together. "Welp, santa has brought me the greatest gift i've ever received," Nick wrote on Instagram Dec. 25. "i'm having a baby yall.