 The nine @-@ episode first season ran from September 26 to November 21 , 2010 . The season premiere introduced viewers to Kody Brown and his three wives , Meri , Janelle , and Christine , and their twelve children , all of whom lived in a <unk> @-@ style home with three interconnected apartments . It also chronicled Kody 's dating and engagement to Robyn Sullivan , who herself has three children , marking the first time in 16 years Kody had <unk> another wife . The new relationship creates insecurity and jealousy among the other three wives , but they ultimately accept her and welcome her into the family . During the fourth episode of the season , Christine gives birth to her sixth child , Truely , which brings the family to 16 children including Robyn 's three kids . 
