Meghan Markle explains meaning behind her nickname for Prince Harry

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is going back to where her fairytale began.

The Duchess of Sussex revealed the reason she uses the nickname "H" to refer to her husband — and the meaning dates all the way back to when they first started dating and "everything was in code."

"I couldn't tell anyone who I was dating, and he was keeping it [secret]," Markle recalled during an April 28 appearance on , "so I think we were just on a letter basis."

From then on, the shortened moniker "just stuck." In fact, Markle — who shared Harry similarly calls her "M" —said that all of their "close friends and family" use their letter nicknames as well.

"I like nicknames a lot," Markle confessed. "I love nicknames."

And matching pet names aren't all that has stuck since the couple and to lead a more private life two years later.

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Markle also gushed that she's still in the "honeymoon stage" with Harry, 40, after seven years of marriage and welcoming two kids, son , 5, and daughter , 3.

“You have to imagine, at the beginning everyone has butterflies,” Markle explained, “and then we immediately went into the trenches together — right out of the gate, like six months into dating.”

However, now that they've settled down in Montecito, California, the 43-year-old feels like they have more time to devote to their relationship.

"When you have a little bit of breathing space, you can just enjoy each other in a new way,” Markle continued. “That’s why I feel like it’s more of a honeymoon period for us now.”

And the "Suits" alum certainly makes time to enjoy the many . As she noted of Harry, "My husband’s very, very handsome. But his heart is even more beautiful.”

Markle added, "He's also a fox, if you haven't noticed."

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