Amber Portwood's fiance, Matthew Baier, was under fire on Monday's Teen Mom OG, and now, he's facing even more criticism from a former friend.

'Teen Mom OG' Sneak Peek: Amber Portwood Learns Of Fiance's Secret Children!

After Portwood's ex-fiance, Gary Shirley, showed documentation of Baier's alleged seven children (Portwood previously claimed she was aware of just two), a woman has come forward, claiming Baier is a "conning, manipulating" liar.

"He flew to my house in Tampa, and stayed with me for two weeks," a woman named Judy Cornett revealed to Radar Online this week, claiming Baier contacted her after she was featured on The Oprah Winfrey Show for protecting children from sexual predators.

'Teen Mom OG' Amber Portwood Defends Fiance, Claims He Doesn't Really Have Seven Kids

After meeting, Baier attended a protest with Cornett and also visited a casino, but once they returned, their friendship turned sour when Cornett discovered she was missing a substantial amount of cash. Once confronted, Baier reportedly began to cry before he was able to have the money wired back to Cornett.

"I am fearful that Matt has not changed," Cornett explained. "I personally feel that he is still continuing his behavior of conning, manipulating and lying his way through life. He has been searching for that pot of gold and I believe he probably thinks he has found it with [Amber]."

For more of Amber Portwood and Matthew Baier, tune into Teen Mom OG on Mondays at 10 p.m. on MTV.

Tags: Amber Portwood matthew baier MTV Reality TV teen mom teen mom og