An OG is leaving Teen Mom OG. Amber Portwood, who starred on the original Teen Mom reality series on MTV and returned alongside Farrah Abraham, Maci McKinney and Catelynn Baltierra for Teen Mom OG, announced she was leaving the series on Twitter.

"Sad to say but I'm not going to be apart of #Teenmomog. The way I have been portrayed and treated is unfair. @MTV sending all my love," Amber tweeted in a series of late-night messages on Thursday, Dec. 15 and Friday, Dec. 16.