Brittany Cartwright doesn't care that her "best friend" slept with her boyfriend.

Years after Jax Taylor slept with Kristen Doute, the Vanderpump Rules star shared a photo of her and Doute.

She labeled her co-star as her best friend while telling fans that Doute is "flawless". It wasn't long until she was confronted by fans about Taylor's past relations with the former SUR Restaurant waitress.

"Whhhhat She slept with your man girl thats girl code #1 watch yo back. #notbffmaterial," a fan wrote on Instagram.

Cartwright quickly responded to the fan's comment.

"Like 4 years before I ever met either one of them! It's called being mature babe "

Shortly after, Cartwright shared an image on Instagram of her and Doute relaxing by a pool in Beverly Hills. She told fans it was "pool season" in the caption.

Despite the rumors of her upcoming spinoff, Taylor gushed over his girlfriend of two years.

"She's just an amazing girl. I love her to death. She's just so sweet, so kind. She has a lot of patience," he said during an interview with The Daily Dish. "It takes someone to have a lot of patience with me cause I'm kind of all over the place. I think patience is the key. Everybody loves her. There's not one person that can say a bad thing about her. I feel like they would trade me in for her any day. I think anybody would."

Months later, it was confirmed that Taylor and Cartwright would be featured in a new spinoff.

To see more of Jax Taylor and Brittany Cartwright, tune into their spinoff series, Vanderpump Rules: Jax and Brittany Take Kentucky, which premieres on Bravo TV this summer. A sneak peek of the upcoming series can be seen below.