Neighbors called the cops to report fighting they heard coming from Evans' house.
"Jenelle and Nathan have been fighting because she doesn't think he appreciates her enough," a source tells Radar, "and they get really loud when they fight.
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"She's now trying to tell people that he was just loudly talking on the phone to her mom, but they were really fighting."
Evans is on unsupervised probation as part of a sentence on drug charges and any infraction of her probation requirements could land her back in jail.
This is at least her eighth arrest since 2010. She nevertheless took to twitter to defend herself, claiming the cops were actually annoyed that the neighbor had called them.