In season six, episode five of MTV's "Teen Mom 2," Kailyn Lowry blamed Javi Marroquin for ruining her friendships, Chelsea Houska found out Adam Lind manipulates their daughter for his own benefit, Leah Calvert changed her mind about giving Corey Simms more custody and Jenelle Evans finally served her mother with court papers.

Houska partnered up with Lind's ex and second baby mama, Taylor Halbur, to fight his request for 50/50 custody of Houska's daughter, Aubree, and Halbur's daughter, Paislee. During one of Lind's weekends with Aubree, he had Aubree leave a voicemail on Halbur's phone to say she wanted to see her sister. Halbur saved the voicemail to use it against Lind in her court appearance to fight for custody, to prove that Lind manipulates his children.

Calvert decided to see her lawyer about her ex-husband Simms' request for having custody of their twin daughters, Ali and Aleeah Grace, during the school week. Her lawyer advised her that the proposed custody agreement, where Simms would have the girls Sunday-Wednesday, wouldn't make any sense. Calvert said she only considered the option because she's tired of arguing with her ex-husband.

"Ya'll should communicate," her lawyer advised, "but don't let him bully you."

Jenelle Evans' mother Barbara finally receives papers stating that Jenelle is taking her to court for custody of Evans' 5-year-old son, Jace, and Barbara is prepared to fight. She refused to include Jenelle in Jace's parent-teacher conference at first, but finally agreed to phone her daughter in last minute. After the call, Jenelle turned to Nathan Griffith for support after it seemed like Jace's teacher implied that his behavioral problems would improve if he stayed with Barbara.

"Is she telling me that Jace needs to stay at my mom's house?," Jenelle asked Griffith. "That Jace shouldn't move? When can he come live with his mother then? When he's graduated? When it's too late for me to have time with my son?"

Lowry and hubby Marroquin got into yet another fight after Lowry took another trip with her friends and left Marroquin at home to watch the couple's two children. Lowry tagged along with her friend Sterling to California for a girls trip to visit Sterling's mother. A tour of Los Angeles was interrupted by a barrage of texts from her husband, and eventually led to Marroquin hitting Lowry where it hurts the most - by calling her a bad mother. The couple's fight caused a rift between Lowry and Sterling and Lowry called Marroquin on the drive home from the airport, crying.

"Now my friendships are being affected because of what you do," Lowry told her husband. "Like this is ridiculous, I'm so f***ing humiliated. Thank you so much for ruining my friendships."

See a clip from the episode below.