Tantrums, rude parents, and meal prepping: Take a look inside the 13-hour day of an elite nanny for the ultra-wealthy

When the nanny arrives, she lets herself in, as all of the family members are still asleep.

First, the nanny lets the family's dogs out and cooks breakfast before waking up the family's oldest son to get him ready for school.

That process is usually interrupted when the infant wakes up. The baby will immediately need a bottle and a diaper change.

The mother is a doctor and the father is the CEO of a local corporation, the nanny told Business Insider.

After they leave, the nanny then turns to household chores while keeping an eye on the baby. She uses the time to do the family's laundry, tidy up their house, cook lunch for that afternoon, and prepare a few extra meals to serve later in the week.

She also will take a break to play with the baby and take him for a short walk. Spending so much quality time with the kids is both the best and worst parts of the job, the nanny told Business Insider.

As soon as they return home, the boy eats the lunch the nanny prepared that morning.

"If lunch isn't ready by noon, all hell breaks loose," she told Business Insider.

After lunch, they have some time to play before his swim lesson.

Both children are given baths afterward.

During this time, the nanny also finishes any chores leftover from the morning and begins cooking dinner for the family.

After dinner, the nanny returns home to get some rest before doing it all again the next day. On occasion, she said she'll even spend the night with the kids if the parents are traveling.

The long hours, temper tantrums, and dirty diapers aren't the hardest part of her day, the nanny told Business Insider. Instead, it's dealing with the parents.

"The part I really hate is when the parents tell me something obvious to do," she said. "They always do it in a condescending way and it's like I haven't been taking care of their children from birth for four years."

But, despite the difficulties the job can come with, the nanny had a clear answer when asked about its positives, too.

"They can be the worst part sometimes, too, but there is nothing like loving and being loved by two amazing kids," she told BI. "They really are wonderful, sweet kids and I know that they view me as part of their family. I've been with them since the oldest was six months old so they really do know me as a concrete part of their life."