Months after Kanye West publicly disrespected the kids of his former friends Jay-Z and Beyoncé, it appears Jay-Z has fired back at his ex-collaborator. While hitting the stage alongside Beyoncé during her “Cowboy Carter” show in Paris on Sunday,

West tweeted about the couple’s 8-year-old twins, Sir and Rumi, in March. The “Stronger” rapper expressed regret — only to walk that back.

Beyoncé’s Cowboy Carter Tour has delivered high notes, viral fits, and Blue Ivy proving she’s more than just a cameo, but Paris got something extra: Jay-Z, and what fans think was a lyrical shot at Kanye West.