"The thing that also surprised us was the fact that in the end, so many people are inspired by us," Kate said. "It doesn't matter if you have two kids or ten. Parents do this job over and over and over again every day. You just repeat it and repeat it. It's the most worth it job ever. We're having a blast."
So how does she do it?
It's all about organization, said Kate, who admits to being a control freak.
"My control is relaxing," she said. "I've met my match. I've realized I'll go over the edge if I don't chill out a little bit. So the 'me' you see now is less controlled than the 'me' you used to see."
For one, Kate deals with not just a few picky eaters, but eight, which has lead to her mantra known well by fans of the show: "If you don't like what's served," she says, "the next meal is breakfast."
"They don't know life any other way," said Kate.
Mady and Cara, the couple's 8-year-old twin girls, played with dolls offstage while their mother demonstrated her favorite meat loaf recipe on "GMA."
"I don't like meat loaf," Cara said, not shy to voice her opinion.
The twins say they prefer their mom's blueberry cobbler and dad's apple crisp.
Jon and Kate also make a point of spending time individually with each child, an important habit that Jon says the children look forward to.
"There is an errand rotation," he said. "The kids always know who is next to come with just me -- and not the other kids -- the grocery store or the bank."
With the kids going to bed at around eight each night, Jon and Kate often retire to their newly-installed porch swing, where Jon says they "just talk."
As for a date night, Kate says the closest they get to that is watching their favorite show, "Grey's Anatomy," together every week.
While having six newborns was a challenge, Kate said that even though the sextuplets are more independent now they are not necessarily easier to care for.
"It doesn't get easier as they get older," said Kate. "It's just different."
Kate said that while she used to just "plop them in car seats and go," as they've gotten older they've become more outspoken.
"Now they can talk back to us," she said.
But Kate said that as time goes on she has stopped sweating the small stuff -- from sticky fingers to how she and Jon will pay for college for eight children. She says she tries her best not to worry.
"God got us this far," said Kate. "He'll get us the rest of the way."