Amber Portwood Slammed by Teen Mom Costars, Viewers After Fight Makes Daughter Leah Cry on Birthday

Amber Portwood is facing backlash after some believe she ruined her daughter Leah's 15th birthday. During last week's Teen Mom: The Next Chapter, Amber, her ex, Gary Shirley, his wife Christina and their daughter Emilee all got together to celebrate Leah's birthday pver dinner. But what was supposed to be a joyous occasion went from bad to worse after Amber showed up late. And that wasn't her only offense -- the mother of two also got into it with the teen, calling her daughter a "d--k," and get...