Chelsea Houska had a tough time weighing the decision to leave Teen Mom 2. During the Tuesday, December 29, episode, Houska, who has been part of Teen Mom 2 since its 2011 premiere, shares her thoughts with husband Cole DeBoer.“Something’s been weighing on me the last few months and I’m finally ready to talk about it on camera,” the 16 & Pregnant alum, 29, says in a new sneak peek.