Venus and Serena Williams have long cemented themselves as tennis legends, and often, when you hear one name, you can’t help but think of the other.

Though some siblings might find it annoying, luckily for Serena, it’s just the way she likes it. In fact, the pro athlete—largely regarded as the G.O.A.T. (greatest of all time) when it comes to the sport—prefers it.

In a new interview with Glamour for its Women of the Year 2024 issue, she “happily admitted” that she and her older sister are “still codependen

Having been born just two years apart and rising to the top of the game side-by-side, Serena reflected on how it’s always been that way.

“Some things never change,” she told the publication. “I don’t even want to not be codependent with her. I love her. I don’t want our lives to ever be separate.”

The sisters are so inseparable that whenever travel excursions lead them to the same city, the 23-time Grand Slam title winner won’t even book her hotel until Venus does, so they can stay in the same place.

“Tennis is so lonely,” she expressed. “You’re on the road for 10 or 11 months out of the year. You really rely on having someone else out there. And Venus was there, and who else was going to relate to me? We were successful, and we were Black. We leaned on each other. We lived together. We lived together until a year before I had Olympia, so literally our whole lives.”

Serena gave birth to her first child on Sept. 1, 2017, and married Reddit founder Alexis Ohanian that November. The couple welcomed a second child together, daughter Adira, in 2023.

With her upbringing to reflect on, the tennis icon was thrilled upon finding out she was pregnant with a second daughter.

“I mean, I grew up with girls. I’d honestly never been around boys unless I was dating one,” she said during the interview. “And sisters are so special.”