FKA Twigs, Kristen Stewart and Robert Pattinson
FKA Twigs, Kristen Stewart and Robert Pattinson

FKA Twigs is certainly overprotective about her fiancé Robert Pattinson and is definitely very furious with his ex-girlfriend Kristen Stewart for talking about him in public.

The British singer was livid after learning that the American actress had described her sex scenes with Robert from the "Twilight" movie during her interview with Harper's Bazaar. She has allegedly warned Stewart to stop talking about her fiancé in public.

According to OK! Magazine, Twigs contacted Kristen and asked her to refrain from mentioning Rob's name every now and then.

"She sent a message to Kristen to 'shut the f**k up' about Robert because she lost the right to speak about him in public 'the moment she got into that car with Rupert Sanders.' It was pretty brutal. It will be a very long time before Kristen talks about Rob again in public," a source said.

Ever since Twigs and Pattinson announced their engagement, Robsten fans have been waiting to see how Kristen responds to it. And to their delight, the actress has been mentioning Rob a lot in her recent interviews.

This has not gone down quite well with the singer, who has now finally warned the actress.

According to an insider, FKA Twigs is very protective of her fiancé Robert Pattinson as he had opened up to her about how devastated he was about Kristen Stewart cheating on him with Rupert.

"Rob has opened up to FKA about that whole nightmare when his ex cheated on him with a married man and revealed he wanted to quit acting forever," the insider said.

"Now that they're engaged, FKA is Rob's fiercest defender, especially since he's been through the ringer in the media with KStew," a source added.

Stewart previously told Harper Bazaar UK that shooting sex scenes with ex-boyfriend Robert Pattinson in "Twilight: Breaking Dawn", was "grotesquely uncomfortable".

"I only hate [sex scenes] when they're contrived. That's when it's grotesquely uncomfortable," the actress disclosed.

The actress explained that she felt pressure to live up to what fans wanted to see.

"On Twilight we had to do the most epic sex scene of all time. It had to be transcendent and otherworldly, inhuman, better sex than you can possibly ever imagine, and we were like: 'How do we live up to that?' It was agony... I wanted it to be so good," she said.

Well, we think FKA Twigs needs to understand that Kristen Stewart will have to say something when people question her about Robert Pattinson, with whom she will be associated forever by the "Twilight" franchise.