Maci and Taylor welcome Cate and Tyler to Chattanooga for a podcast swap and reunite with Kail from Teen Mom 2; Leah speaks at an addiction awareness walk; Amber misses Leah's 16th birthday while Kristina promises to never abandon her.

Mackenzie takes a pregnancy test; Taylor and Ryan go golfing; Cheyenne tries a holistic treatment for her fertility struggles; Briana tries to mend Nova and Devoin's relationship.

Briana's daughter Stella refuses to see her dad; Leah's daughter Addie has surgery; Cheyenne is frustrated as Cory fails to show up for Ryder's health scare; Ashley and Tea confront each other; Mackenzie learns she may not be officially divorced.

Mackenzie learns she's having twins; Leah gets Ali medically cleared for her drivers test; Bentley and Ryan spend time together; Amber rekindles her relationship with her mom; Cheyenne breaks down over her fertility, feeling unsupported by Zach.

Mackenzie, Khesanio and the kids travel to Oklahoma to surprise her family with the announcement, she's pregnant with twins; Ashley moves into a new home to escape memories of her past; Ryan proposes to Amanda with Bentley's help.

Maci, Cate, Tyler, Leah, and Gary reunite in NYC with their teenagers to celebrate 16 years of Teen Mom; Cate finds her place without Carly; Leah Shirley speaks up about her relationship with Amber; back home, Amber works through trauma with her mom.