Actress Kristen Stewart is reportedly "suspicious" of her former boyfriend's, Robert Pattinson's new girlfriend, FKA Twigs.

According to a source, the "Twilight" star believes that the up and coming performer is using her old flame to get some media attention for herself.

"Kristen was already suspicious of her motives, but when she heard that FKA was straight up talking about Rob to the press, that confirmed it. She knows Rob wouldn't be okay with that. It's so obvious to Kristen that this girl is just taking advantage of Rob ... She's still very protective of Rob," a source shared.

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Stewart and the actor were quite secretive about their relationship before Stewart's affair with "Snow White and the Hunstman" director came to light.

Whether or not FKA Twigs, whose real name is Tahliah Debrett Barnett, is using Pattinson for the fame, it does seem that she is more vocal about her relationship with the actor than Stewart was.

In a recent interview, the "Two Weeks" singer admitted that being Pattinson's girlfriend is "challenging", especially since she is getting a lot of slack online from fans who don't like the fact that Pattinson is dating a black female.

However, she said that despite the negativity, she is fighting to keep him because she "loves him".

When asked why she always looked so uncomfortable when photographed with the actor, the singer shared, "I look uncomfortable because I am uncomfortable. But then it's like, is this person in my life worth that? And he is, without question ... In comparison to how happy I am. And how I feel with him. It's 100 percent worth it."

She shared that the paparazzi has nothing to do with her, but that she has to accept the fact that they will always be around because of who Pattinson is.

FKA Twigs also shared that in the beginning, it was overwhelming because the paparazzi were simply not part of her reality. She said instead of looking at it as something horrible, she chose to call it as "very challenging" instead.

TagsKristen Stewart, Robert Pattinson, FKA Twigs