The second group of MTV's young mothers returned for the season 2 premiere of "Teen Mom" on Thursday, July 9. Kailyn Lowry, Chelsea Houska, Jenelle Evans, and Leah Messer are back with brand new challenges, ranging from custody battles, feuds with family members, and one cheating allegation. 

Leah appeared to be overwhelmed in the premiere. The young mom has to care for her three children, deal with an ongoing custody battle with her ex-husband Corey Simms, and work on her marriage with her husband, Jeremy Calvert. During dinner, Leah urged Jeremy to go to counseling with her to work on their marriage. She told him that he has to set his work aside and put his family first. Unfortunately, Jeremy didn't like where the conversation was heading, and he left the table even before their meal was done. 

Later, Leah attended the final court date in her harrowing custody battle with Corey over their twin daughters. Leah was ecstatic when she won and got the girls to stay with her full time. When she dropped off the twins, Leah confronted Corey about the custody case, and he said that it wasn't a personal attack on her. 

Another one dealing with a custody case is Chelsea, who is fighting with her ex, Adam Lind, over their daughter Aubree. Adam wants 50-50 custody of Aubree, but Chelsea wasn't having it. She reached out to Adam's ex, Taylor, who also got served similar papers for her own daughter Paislee. Despite their previous differences, Taylor agreed to share her lawyer with Chelsea in the upcoming custody battle. 

Meanwhile, Kailyn and her husband, Javi Marroquin, are still working to save their marriage. The couple has been going to therapy, but Javi appears to be having trust issues as he told Kailyn that he didn't want her to go to a concert that she had planned to go to months ago with her friends. He said that he got mad and didn't want her to go because he feels that she has fun with her friends but not with him. 

Later, another fight escalated when Javi saw a text message between Kailyn and a boy in her class. 

"Someone texted me 'Good morning and do I have class?' and now I'm cheating on him and I'm a liar," a sobbing Kailyn told her friend.

When Kailyn tried to explain to Javi, he told her to "get out of my face" and to leave the room. 

"Teen Mom 2" airs Thursdays at 10 p.m. on MTV.