The wife of the TV chef said that she prefers to keep an eye on his emails, phone history and online accounts in order to check that he isn't being unfaithful.
"Yeah, I'll check his emails. I'll check his Twitter. I'll check his phone. Everything seems fine," she told The Sunday Times.
"He says I'm a jealous girl, but I think I'm fairly laid-back, considering."
Jools Oliver also said that her husband has a feminine side that most TV chefs do not possess, and that she would prefer to see him more often than his busy workload allows.
"He's quite girly. He chose the pink in the house. He does the girls' hair in the morning, plaits it, straightens it.
"I understand what he is doing a bit more now. Before, maybe I was a bit naïve, and I thought it was all about me and the children.
"How could he leave me to go and help people in America? Now I do see. But there are still times when I say, 'I don't care, I just want you home'."
The couple have spoken about each other in interviews in the past, with Jamie Oliver stating in 2010 that they at times "despise" each other.
Jamie Oliver is currently producing new series Chef Race: UK vs US for BBC America.