Reality Fauxmance: 'Teen Mom' Amber Portwood Engaged To On-Off Boyfriend Matt Baier— But Just For The Cameras!

In the shocking new trailer for Teen Mom OG, Amber Portwood's much older boyfriend, Matt Baier, offers the MTV star a diamond ring and asks for her hand in marriage.

RadarOnline.com can exclusively confirm that the 23-year-old mom of Leah, 6, said yes.

"He proposed in November, and she accepted," an insider close to the reality star tells RadarOnline.com.

As RadarOnline.com first reported, the couple met on Twitter last summer and began dating in October, when the 43-year-old moved from Massachusetts to Portwood's native Indiana to be by her side.

But the whirlwind engagement was just a cheap ploy for camera time on the hotly-anticipated series' return, sources insist.

"The proposal was all for show," the insider scoffs, adding that the unemployed father of two couldn't have purchased the ring on his own. "He doesn't have that kind of money."

And the relationship is far from stable: Portwood and Baier broke up after an explosive fight in late January, only to kiss and make up a week later, RadarOnline.com exclusively revealed.

"They have a very tumultuous relationship," an insider explained to RadarOnline.com earlier this month. "They get into big fights and Matt says he's moving out. But then hours later, they act like everything is fine."

Do you think Amber and Matt will make it down the aisle? Sound off in the comments.