Supernanny Jo Frost knows better than anyone the strain an unruly child can put on the rest of the family.
But her hands-on experience with countless households around the world has also given the childcare expert a unique insight in to how strained relationships between family members can affect everyone around them.
After more than two decades helping parents rediscover their confidence and authority, Frost has turned her considerable skills to helping entire families step back from the edge of self-destruction in her new series, Family SOS with Jo Frost.
Frost said the series was a natural extension of her work.
"You are dealing with different situations, different ages and for the first time the viewer is getting to see my work in its entirety," she said.
"I look at 21st century issues, I look at adoption and blended families, I look at teenagers who are smart mouthing their parents and back chatting, and parents who want to grab each other by the throat and the whole entirety."
Each episode sees Frost spend a week observing and working with a family, before giving them "homework" in an attempt to help them repair their damaged relationships.
In the first episode, Frost visits the Quinn-Davis family - a blended family whom Frost describes as "not quite blended right now".
Recently wed couple Don and Julie, who have six adolescent children between them from previous marriages, are constantly bickering and their disintegrating relationship is causing the kids to act out.
In a society saturated with reality television it would be fair to wonder how much of the teenagers' behaviour was influenced by the presence of cameras - a point raised by Julie's teenage son Chad - but Frost was adamant the cameras were immaterial.
While the process was necessarily truncated to fit in to one 90-minute and five 60-minute episodes, Frost said every member of the family was expected to take part and her team could film more than 200 hours of footage for each episode.
"If you are trying to keep up a pretence because the camera is there then you are not going to keep it up for long, because the reality is that when you are a family and you need help, that is always going to play at the forefront," Frost said.
"I am not someone who looks at a family and says, 'Oh, that's it, we can't do it'. I look for ways to resolve things." Frost said the experience was intense but she was passionate about helping families reconnect.
Her techniques, which revolved around setting rules and chores, encouraging communication and expecting children to respect their parents, have earned fans around the world for the practical, common-sense approach and appear to work just as well on whole families as they do on toddlers.
"I think parents today have lost a lot of confidence, and they are unsure about what decision to make, so they do not make decisions," she said.
"I feel that what I teach parents is how to . . . build the confidence to make decisions."If you make a decision and you make the wrong decision, then you don't make the same decision the next day. I wanted to bring this to families around the world to see if they could learn the skills necessary to keep it together because I think it is so important for us to stay connected with family."