Pete Davidson told Kanye West he was between the sheets with Kim Kardashian in texts which have been leaked.
The comic, 28, messaged Kanye, 44, defending Kim, 41, as a mother as the relationship between the now divorced couple continues to sour.
Since news broke that the Saturday Night Live comedian and SKIMS founder had entered a whole new world, Kanye has bashed Pete online, calling him, among other things, a d***head.
However Pete has now clapped back with a string of stinging texts, which were shared to comedian Dave Sirus' account.
"Yo it's Skete, Can you please take a second and calm down. It's 8am and it don't gotta be like this," Pete wrote.
"Kim is literally the best mother I've ever met. What she does for those kids is amazing and you are so f***ing lucky that she's your kids mom.
"I've decided I'm not gonna let you treat us this way anymore and I'm done being quiet. Grow the f*** up."
Kanye, who had made no secret of his contempt for the comic replied, saying: "Oh you using profanity, Where are you right now?"
Not missing a beat, Pete wrote back: "In bed with your wife."
Sharing a selfie of himself in bed with his tongue sticking out, Pete carried on the exchange.
He continued: "I'm in La for the day if you wanna stop being a little internet b**** boy and talk.
"You don't scare me bro. Your actions are so p**** and embarrassing. It's so sad to watch you ruin your legacy on the daily."
Kanye invited the star to meet, saying: "You're more than welcome to come to Sunday Service."
Pete suggested: "Why don't we meet after Sunday service and saints game ... I'll be at the BHH we can have food and talk it out in my room. Privately one on one. Man to man."
However he then warned the Eazy star about his actions, writing: "What you are doing to your family is dangerous and going to scar them for life. Please handle these matters privately bro I beg you."
Despite the beef between the pair, Pete later appeared to offer an olive branch to the Stronger star in light of his mental health issues.
The comedian said: "Let me help you man. I struggle with mental stuff too. It's not an easy journey.
"You don't have to feel this way anymore. There's no shame in having a little help. You'll be so happy and at peace."
Pete then stated that he'd actually protected the artist legally known as Ye, saying he'd asked his fellow comics not to rib the troubled rapper.
He said: "You have no idea how nice I've been to you despite your actions towards me.
"I've stopped SNL from talking about or making fun of you which they've wanted to do for months.
"I've stopped stand up comedians from doings bits about you cause I don't want the father of my girls kids to look bad out there.'
"I have your back even though you treat me like s*** because I want everything to be smooth."
But in a stark warning to the Donda star, Pete concluded: "But if you continue to press me like you have for the past 6 months - I'm gonna stop being nice..."
