In this ‘Sister Wives’ supertease, Kody Brown declares the family’s at ‘civil war’ after his splits from Meri, Janelle and Christine. Robyn, who’s still married to Kody, says she feels like the ‘idiot who got left behind.’ Plus, Kody prepares to meet Christine’s then-boyfriend, now-husband, David Woolley, at a party. ‘Sister Wives’ returns on Sept. 15 at 10 p.m. ET on TLC.