Things are reportedly heating up for Kim Kardashian and F1 driver Lewis Hamilton — but a source tells In Touch that Kanye West is less-than happy about the budding relationship.

“Kanye is bitter as hell about it,” says the source. “He’s calling Lewis a slimy, two-faced rat.”

The reality star, 45, and the rapper, 48, were married when they befriended the racecar champ, 41, appearing on red carpets together and even inviting him to their marital home for Easter in 2015.

A decade later, The Sun has reported that Kardashian — who filed for divorce from West in 2021 — and Hamilton were spotted at Estelle Manor in the English countryside before enjoying each other’s company in London and in Paris.

According to the source, the Yeezy designer “suspected” the Ferrari star was “creeping on” the Skims founder back in the day during their friendship, but “Lewis always denied it. And Kim said Kanye was just being insecure. Now he feels vindicated.”

One of the West’s signature X rants may not be coming, though.

On Monday, January 26, the recording artist took out a full-page ad in The Washington Post, apologizing for hurting others with his past “impulsive” behavior — which he blamed on his previously undiagnosed bipolar disorder.

“Kanye’s trying to bite his lip about Kim and Lewis,” admits the source. “But behind closed doors, he’s raging. He’s hoping it all ends in tears for both Lewis and Kim.”