Credit: MTV

Teen Mom 2 Season 4 is coming to a dramatic end on Monday, April 29 at 10 p.m. ET on MTV. Read on for what you can expect in the highly-anticipated twelfth episode of Season 4!

Jenelle Evans: Jenelle hit a breaking point in Episode 11 after getting evicted from her apartment, spiraling into a deep depression. Her boyfriend, Kieffer Delp, cheered her up with some "dope," which we're pretty sure doesn't mean marijuana. In the finale, we'll likely see the pair engage in some serious drug use and we're already clutching our Uggs in fear. On the upside, all her charges were dismissed from her fight with ex Gary Head, so there's that.

Leah Messer: After three years, it looks like Leah and Corey will finally get the answers they deserve about their daughter Ali. The divorced parents take their little girl to the hospital for a muscle biopsy in the Season 4 finale, which will most likely lead to that much-needed diagnosis. Check out the emotional sneak peek clip of Leah and Corey taking Ali to the hospital for her big test.

Chelsea Houska: Chelsea Houska just celebrated Aubree's third birthday (they grow up so fast!), but her life is hardly drama free. Baby daddy Adam Lind seems happier than ever with his new GF Taylor, and throws his own separate party for Aubs. In the finale, there's likely to be plenty of drama between these former lovahs (and hopefully a cameo or two from our favorite sidekick, Landon Blow).

Kailyn Lowry: Kailyn and Javi are engaged (squee!) but not everything is fun and games. In Episode 11, Kail finally tells baby daddy Jo about their plans to wed and Javi's plans to join the Air Force. In the Season 4 finale, the pair will tie the knot at the courthouse and say their emotional goodbyes as Javi leaves for basic training. Can Kail hold down the fort without her man? That remains to be seen.

Will you watch the Teen Mom 2 Season 4 finale on April 29? Tell us below.