Matt 'Made Sexual Advances' To Another Woman! Watch The Jaw Dropping Moment Amber Learns Baier Cheated

The final straw! In order for Matt Baier to prove his loyalty to Amber Portwood, he took a lie detector test. And now, the results are revealed and caught on camera!

The man who gave Matt the test explained that he was "completely cooperative" during the entire thing.

The first question, "Have you engaged in any sexual activity with anyone other than Amber since October 10th, 2014," which he replied no. And it was the truth.

The second, "Since meeting Amber, have you had any sexual communications with other women," which he said no. And that was the truth.

As for the third question...

Watch the shocking moment here! Teen Mom OG airs Monday nights at 9pm ET, only on MTV!