Ethan Plath didn't mince words on the latest episode of Welcome to Plathville, asking his future brother-in-law Zac Wyse all the hard questions. During the Tuesday, August 12, episode of the TLC series, Ethan, 27, and Micah Plath poked fun at Zac's proposal plan as he prepared to ask their sister Lydia Plath to be his wife after four months of dating. Ethan and Micah, 24, started a small fire in the woods and threw a chair into the lake as Zac tried to get their help for the engagement that afternoon.