Kylie Kelce asked her and husband Jason Kelce's parents not to kiss their children's faces, heads or hands when they had kids.
The 34-year-old podcaster has four daughters, Wyatt, 7, Elliotte, five, Bennett, three, and Finnley, 19 months, with her husband, ex-NFL star Jason, and she admitted the couple's parents "listened" to their wishes.
When asked on her podcast Not Gonna Lie if she set boundaries with her in-laws or her parents when she and Jason had Wyatt, Kylie said: "I asked people not to kiss her face or her head or her hands.
"And everybody listened."
Kylie admitted both her and Jason's parents are "very respectful" of their requests when it comes to their kids.
She added: "We have a good little squad. Squad understands the assignment.
"Squad is very respectful about the fact that they have raised their grown children and that this is an opportunity for them to be fun-loving grandparents and supportive.
"So, we actually made out like thieves on this one.
"I don't necessarily know that we had to set boundaries."
Kylie, a self-confessed "germaphobe", also had to set strict boundaries when Wyatt was born amid the coronavirus pandemic.
She added: "It was kind of stinky because Wyatt was six months old when COVID hit.
"So, being the germaphobe that I am, and also the unknown with a six-month-old in your house, we locked it down pretty fast.
"We were very careful, so that was the time where we set boundaries just in terms of like travel and things like that.
"But outside of that, not really, no. Everyone understands the assignment, so we really lucked out."
Kylie previously admitted she has been judged for having four children.
Speaking on her podcast in May, she said: "As we have announced our consecutive pregnancies, I think people are less (excited) like, they're like, 'Oh, congratulations.'
"By the fourth one, people are like, 'Congrats. You know, you guys don't have to touch each other?'
"(Some of my loved ones have said) 'Guys, could you just not? You guys could, you guys could not. You know? Every so often when you say you have four kids, people look at you like, 'Do you guys know about contraceptives?'"