The bond between sisters is unbreakable. Even if they just played sisters on TV, you should know better than to try to come between female siblings. Just ask Beverley Mitchell, who played Lucy Camden, younger sister to Jessica Biel’s Mary Camden on the first six seasons of beloved TV drama 7th Heaven about her fierce warning to Biel’s future mother-in-law about her “Sexyback” son.

In a new chat on the Pod Meets World rewatch podcast with Danielle Fishel, Rider Strong and Will Friedle, Mitchell reminisced about her time on the show with Biel, as well as her days as a young star running around with the guys in boy band *NSYNC.

In addition to describing running around the Las Vegas Strip with “NSYNC like hooligans” during one of the group’s “Challenge for the Children” charity events back in the day — as well as in Miami with Cameron Diaz and Gabrielle Union — Mitchell noted that she’s still very good friends with the guys from the band. “And it’s funny that one of them ended up marrying my best friend,” she said.

That “one of them” is, of course, Justin Timberlake, who has been married to Biel for more than 13 years and shares two boys with the singer, Silas, 10, and Phineas, 4. “I gave Jessie so much crap because she used to make fun of me. She would be like, ‘You’re hanging out with the NSYNC boys,’ and I’m like, ‘Dude, they’re fun, we have fun.’ And she used to think I was so silly and lame and now you’re married to one,” Mitchell said.

It wasn’t always fun and games, though. Mitchell noted that when Biel — whom she refers to as “my sister” — and Timberlake first started dating, JT’s mother, Lynn Bomar Harless, asked, “‘Okay, Bev, tell me about her [Biel].’ And I was like, ‘if he hurts her, I’ll kill him.’”

Listen to the full episode here.