'Teen Mom 2' trailer: 'Mommy's going to have another baby!'

leah-messer-calvert-trailer-teen-mom-2.jpgThe young mamas are really bringing the drama in the third season of "Teen Mom 2", and the proof is in the reality series' new extended trailer.

Leah Messer Calvert gets the most screen time, as the season will document some major life events for the 20-year-old: braces, divorce from the father of her twin daughters, Corey Simms, her subsequent engagement to Jeremy Calvert and their pregnancy. Although she suffers a miscarriage, Leah recently revealed she and Jeremy, now her husband, are pregnant again.

Jenelle Evans' tragic tale continues apace, dominated by drugs and jail. In one scene, Jenelle bawls, "I'm such a f*** up." (If she's talking about her Ed Hardy seat covers, afraid we have to agree.)

However, there is one new twist this season: a paternity test to determine whether deadbeat dad Andrew Lewis is really Jace's father.

Meanwhile, loafer Adam Lind gives baby mama Chelsea Houska a promise ring. When her dad, Randy, notices it, she says, "This is awkward" -- because Adam used Randy's allowance to buy it? (We kid!)

Some stuff happens with Kailyn Lowry, too, but nothing will ever be as interesting as that STD love triangle.

Season 3 of "Teen Mom 2" premieres Monday -- a new night -- Nov. 12 at 10 p.m. on MTV.

Photo/Video credit: MTV