Leah Messer is not even out of her teens and she is about to have her third, maybe her third and fourth baby and get engaged and married again. The Teen Mom has apparently learned nothing from getting pregnant at 16 and married and divorced at 19. Her divorce is not even finalized from baby daddy #1 and now she is engaged to and pregnant with Jeremy Calvert. This time Leah says it is real and not forced so everything will be perfect. That is until she finds another guy. How many times did she cheat on Corey? When you cheat that many times you know she is going to cheat again.