In Us Weekly's exclusive clip from the Welcome to Plathville season finale, Veronica Peters has one final showdown with Micah Plath's mom, Kim Plath. "I was 100 percent on your side up until this morning, when I found out you were calling me names behind my back," Kim, 53, says to Micah's now-ex in a preview from the upcoming Tuesday, September 30, finale. "I can't do that." When Veronica tells Kim, "I don't think I could let people in that I don't trust," Kim fires back in no uncertain terms. "Then you'll never have relationships," she warns.