Chyna, who is engaged to Rob and pregnant with his baby, was furious after Wendy claimed she is not attracted to Rob and is taking advantage of him and hit back with a furious post on her Instagram page, reported Us Weekly.
Sharing an unflattering picture of Wendy, she wrote: "Wendy.. Wendy.. Wendy....You lost your mind? How dare you speak on me, my fiance, and my mom like you were at the Christmas table with us?!
"I find it so funny how you love to talk about Rob and his insecurities like at a point in time you wasn't a fat 400 pound on the radio!
Rob's weight has ballooned to over 300 pounds in recent years but Wendy claimed that was not the issue.
"It's not even about Rob being overweight... It's about Rob's lack of confidence. A woman likes a man to take control. I really do love Rob. He seemed to be a different kind of guy (during the early days of 'Keeping Up With The Kardashians').