Jenelle Evans was arrested for allegedly assaulting her ex-fiance's new girlfriend last month, but according to the Teen Mom 2 star, she was acting out of self defense.

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Although Jessica Henry, the new girlfriend of Nathan Griffith, was not arrested at the time of their dispute, the reality star claims she feared for her well-being when the new couple arrived to her former home in South Carolina.

"I thought she was trying to attack me because she got out of the truck and came to my driveway," Evans told Rumorfix last week. "I was defending myself - my son was inside the house upstairs sleeping and I was not comfortable with these people just coming to my house."

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Griffith and Henry arrived to Evans' home last month to retrieve his belongings before Evans moved out of the home and returned to North Carolina, where she has since gotten a new place.

After reportedly feeling threatened by Henry, Evans claims she accidentally hit the woman with a glass cup, and then thought, "Oh my gosh, I am going to get in so much trouble." But then, moments later, Henry allegedly retaliated, and "picked up the glass and threw it at me."

"I was surprised because I didn't think she was going to do that, so I went inside the house and then Nathan [told the cops] '[Jenelle] went out and attacked her!'" Evans recalled.

For more Jenelle Evans, tune into Teen Mom 2 season six on Thursday nights at 10 p.m. on MTV.

Tags: Jenelle Evans Teen Mom 2 MTV Reality TV jessica henry Nathan Griffith