Who's in the right? In episode 4 of Teen Mom 3, Briana and her baby's father, Devoin, argue about his involvement — or lack thereof, if you ask the mom — in their daughter's life.
"You've been missing out on a lot,"Brianna calmly tells her ex as he plays with their adorable baby girl, Nova. "It isn't fair because you really don't chip in and you don't help."
PHOTOS: Teen Mom cast -- where are they now?
Devoin isn't having it, though. "You don't share her or nothin', so don't be surprised that you have a lot more work on your hands," he teasingly chides her.
And that's when tensions escalate and tempers flare. "I'm asking for one simple thing. To have Nova in my life," Devoin states after a friend comes to Briana's defense and says that "a dad isn't just having your kid on the weekends."
PHOTOS: Adorable Teen Mom 2 tots
When he reminds Briana that she won't allow him to take their daughter outside, the clearly frustrated young mom retorts, "You can't even survive an hour with her alone! Nova's not leaving my sight, Devoin. I've been with her since day one. I'll be damned if I let her go with you alone. She knows me. She needs me."
PHOTOS: Teen Mom 2's most dramatic moments
Watch the dramatic trailer and tune in to MTV on Monday, Sept. 9, at 10 pm EST, to see the entire episode.
