'I'm Upset!' Jenelle Evans Keeps Son From Nathan Griffith Despite Custody Agreement

Nathan Griffith sees his son Kaiser with ex Jenelle Evans every other weekend – if she lets him. On RadarOnline.com's podcast Teen Mom Time, the Teen Mom 2 dad exclusively revealed Evans doesn't always follow their custody agreement.

"Sometimes she's nice to me, sometimes she isn't," he said. "I don't understand the reasoning behind why she chooses to not let me see my child one weekend."

While her decision "upsets" him, he remains "calm."

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"I try not to let my anger get the best of me because I love seeing my child," he said. "Hopefully those problems could be resolved in the future. If not, I will always fight for my son. I love him to death."

Griffith, who is also father to daughter Emery from a previous relationship, explained how he has "no relationship" with his baby mama. "I have to go through her husband," he said. "With her husband, it's mostly on text."

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In September, Griffith's mother Doris Davidson filed an emergency motion to have full custody of Kaiser, claiming Evans harassed her via text. She also claimed Evans tested positive for marijuana in the hospital when she gave birth to her third child Ensley.

"There has always been concerns," Griffith said of the filing. "Even in the public eye, on social media, everyone has concerns for my son, including myself. There are proper measurements we are trying to take just to ensure his safety."