Jenelle Evans
just can't get anything right, can she? Because last night on the "Teen Mom 2" season premiere, her mistakes landed her in the middle of yet another HUGE blowout with her crazy mom, Barbara.

After finding out Jenelle was secretly hanging out with oft-arrested boyfriend Kieffer Delp again -- something Barb strictly forbade -- she went off, started screaming and kicked her daughter out of the house.

"Get out or I'll call the police! This is it, you're done, you're never here again, goodbye!" Barb shouted, as Jenelle held onto her crying son, Jace, who was there for the entire blowout.

Barbara started throwing all of Jenelle's clothes out the front door, while shouting "I hope you have fun living in the f**king street with your boyfriend ... your scummy ass boyfriend!"

"Shut the f**k up, you're no better than me!" the 19-year-old countered with, but it was Barb who got the last word -- shouting "You're too selfish to take care of your own kid, little bitch!"

And with that, season 3 of the MTV show was back with a vengeance.

Do you think Jenelle will ever clean up her act?

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