This Sunday at 10pm ET/PT, TLC brings viewers inside the rarely-seen world of plural families with the premiere of Sister Wives, a seven-part series following Kody Brown, his three – soon to be four – wives and their many children.

Sister Wives is about husband Kody, his three wives Meri, Janelle and Christine and their combined 13 children, and shows how they attempt to navigate life as a “normal” family in a society that shuns their lifestyle. From their unconventional family structure and living arrangements to financial challenges, each episode exposes the inner workings of a polygamist household, revealing the tight-knit and loving relationships between Kody’s wives.

Sister Wives also captures the intense dynamics surrounding a man juggling three wives while attempting to keep it a secret from the outside world. The general public is not the only challenge that the Brown family unit is facing, however – the series begins with Kody announcing plans to take on another wife and her three kids. Although expected, the news is met with mixed feelings. Meri, Janelle and Christine were married before starting families so all of the children grew up as siblings. And for sixteen years, the sister wives have established their own roles within the group and worked together to maintain a cohesive, loving unit. Bringing on a fourth wife could easily disrupt the balance. The series chronicles the growing pains as Robyn and her kids assimilate into the family and the sister wives work through the insecurities and uncertainties that are inevitable to their chosen way of life.

Meet the Brown family, watch a Q&A with the sister wives, learn about their favorite recipes , and take a tour of their home .

Also, here is a sneak peek of what you’ll see on Sister Wives.