Tammy Slaton got teary-eyed while listening to a poem her husband, Caleb Willingham, wrote for her in a sneak peek for the season premiere of 1000-Lb Sisters. In the clip, the newly married couple are preparing to say goodbye to each other. Tammy is moving out of the Ohio-based rehabilitation facility to go back home to Kentucky, while Caleb needs to stay to work on his health so that he can eventually be approved for weight-loss surgery. “Sunflower, sunflower, God planted you as a seed in a field full of many, but you he meant for me,” Caleb reads his own words, choking back emotion. “In fiel…