Leah Calvert Custody Battle: 'Teen Mom 2' Star 'Upset' About Heading To Court With Ex-Husband [Video]

Leah Calvert is devastated over her upcoming custody battle with ex-husband Corey Simms.

Corey Simms Files For Full Custody Of Twins

Earlier this week, it was reported that Simms was planning to file for full custody -- and that he woulld use Calvert's recent use of prescription pills in an effort to take the twins from Calvert.

“Yes, Corey is trying to get more custody but only because he wants more time with them,” an insider confirmed to Rumorfix on Sept. 4, adding that “Leah has never taken any medication that was not prescribed to her.”

Leah Calvert's Pill Use Exposed On 'Teen Mom 2'

On Sept 3., In Touch Weekly reported Simms was threatening to file for full custody after Calvert requested he pay her more child support. In a recent episode of the show, fans watched as Calvert approached Simms in an effort to get more money to raise their four-year-old twins.

According to Rumorfix, the tabloid also claimed Calvert had sent Simms "inappropriate" text messages, which set off his new wife, Miranda.

“Miranda is leading the bus Corey is in,” the source explained. “She wants less to do with Leah so Corey gaining more custody of the girls can make that happen."

"They are all getting along right now but Leah is very personally hurt by their actions,” the source added.

In a sneak peek at an upcoming episode of Teen Mom 2, Calvert and Simms are seen arguing over Ali's mounting medical bills, as well as his failure to keep in contact with his insurance provider.

Teen Mom 2 airs on Wednesday nights at 10 p.m. on MTV.