FKA Twigs blows up at Robert Pattinson over his ex Kristen Stewart!

Uh oh, sounds like R-Patz is in the doghouse!

Robert Pattinson may have long moved on from his ex Kristen Stewart and found love again with FKA Twigs, but we’re told the actor’s fiancée gets “jealous and insecure” about his friendship with his former flame!

FKA Twigs, Robert Pattinson and Kirsten Stewart. Photo: Getty

According to In Touch magazine, FKA blew up at Rob, 29, after he said he wanted to support K-Stew at a NYC event for her new movie, Clouds of Sils Maria.

“[FKA] went ballistic and screamed, ‘No f***ing way,” spills a source. “Now, as his relationship with Twigs gets more volatile, he’s feeling completely torn between the two women.”

While the Twilight stars have not been pictured since they split in 2013, they are believed to have remained on friendly terms.

“Robert and FKA Twigs were supposed to get married this year,” adds the insider. “That was the plan, but his indecision over the situation has caused a delay.” Yikes!

Could Kristen have anything to do with this, we wonder?