There has been a lot of drama in the first part of the "Teen Mom 2" reunion special, from child support and walk outs. Here's what fans need to know to get up to speed. 

According to Hollywood Life, Kailyn is still struggling with child support payments from Jo for their son. At the end of the last season, fans learned that Jo didn't have enough money to pay Kail, partly because he's unemployed. And he reportedly has no plans of finding a job at all. During the special, Jo revealed that he doesn't see his son Isaac that often, which is said to be a good enough excuse for him to be unemployed and not pay for child support. 

The reunion special did not leave any drama at home either as fan favorite "Teen Mom 2" star Janelle didn't just leave the set once but twice. 

According to US Weekly, Janelle and Nathan were trying to make their on-off relationship work, but now that the couple finally decided to end their relationship, she is finding it difficult to see Nathan with someone else. 

Janelle stated during the special, "I just never thought he would just leave me and move on. And it hurts. When he completely cut me off and all I was trying to do was get him back for so long. And nothing I did was working so I just gave up, and, finally, when I gave up, he came back to me and he wanted to be back with me." 

Christian Post, however, reports that Nathan defended himself and stated that it is hard to be strong in the face of all the drama that is happening in his life at the moment. He has been recently charged with two counts of domestic abuse after police arrested him when neighbors reported the couple fighting. Janelle suffered a bruised thigh and an injured finger. 

The second part of the "Teen Mom 2" reunion special will air on Oct. 7 on MTV.