Ariana, 36, had suffered severe postpartum depression after having her first daughter. When she became pregnant again, she stopped the antidepressants she took for fear of harming the babies, a decision that could have been fatal.

"We were so excited to have twins. I can't even describe how happy she was," Tyler Sutton said. "There were no signs that anything was wrong. He was always joking about his swollen ankles and that he couldn't wait to have a cup of coffee"