More scandalous revelations came to light in the recently concluded second part of "Teen Mom 2" season 6 reunion special.

One of the biggest controversies that was discussed during the "Teen Mom 2" season 6 reunion special was the surprising affair between Leah Messer and her first husband Corey Simms during the early months of his marriage to his current wife Miranda Patterson back in 2014. Leah was also still with her second husband Jeremy Calvert during that time.

The rumor was first revealed on Wetpaint last September, saying that several sources knew that the former couple had a secret rendezvous at the back of his truck in late 2014. But Miranda already knew about it before she got pregnant with their first child  and chose to forgive him for his infidelity. However, it does not mean that Miranda can also forgive Leah easily at this point.

During the reunion special, Corey could not deny the cheating allegations when Dr. Drew Pinsky probed the former couple during the reunion specials.

"Were you guys still kinda together when Miranda hit the scene?" Dr. Drew asked. After a few moments of silence, Leah finally answered, "Things happened that shouldn't have happened. And it was disrespectful to Miranda. And I have apologized."

But while Leah could easily open up about her affair with the father of her twin daughters Aliannah and Aleeah, she turned reprehensive when her alleged drug abuse was raised.

Dr. Drew reminded Leah that he will always be there for her if she is really having substance abuse problems, but she quickly dismissed that, saying that she never got addicted to drugs, and the reason why she went to rehab was because of her depression and anxiety.

Meanwhile, Sioux Falls-local Chelsea Houska also had a heated confrontation between her and Adam Lind, the father of her daughter Aubree.

Lind said that he's cool when his daughter calls her mom's boyfriend Cole DeBoer as "dad," since he finds him responsible for his daughter's life.

MTV's "Teen Mom 2" season 6 is over, but the cameras for season 7 have started to roll.