Kristina Robinson is 18 and from Texas. Her story could prove to be one of the most emotional and heart-breaking in 16 and Pregnant history because her fiance John Toff Hight, Jr. drowns during the course of filming her episode. Kristina gave birth to her son Lukas Todd almost two months premature on September 26, 2011. Both Kristina and Lukas are reportedly doing well. Actually, Kristina announced on Facebook that she has a new fiance after getting engaged to TJ Head on December 23.