Rihanna is reportedly jealous of rumoured boyfriend Lewis Hamilton's relationship with his ex-girlfriend, Nicole Scherzinger.

It's believed Lewis is still communicating with his ex and Riri wants it to stop. According to a source, RiRi has demanded for Lewis to cut ties with Nicole if he wants to continue dating her.

The source told InTouch Weekly (via IOL Tonight) that it annoyed Rihanna that Lewis is still communicating with Nicole after their split. The Bajan beauty is reportedly worried that their constant messaging would lead them to get back together.

"Nicole was constantly texting Lewis and it annoyed Rihanna. So she told him that if he doesn't cut contact, it's over," the source said.

"Rihanna's worried that a spark may still linger. She wants to ensure she's the woman in Lewis' life," the source further told InTouch Weekly.

Nicole, 37, and Lewis, 30, ended their long-term relationship earlier in February and the "Pussy Cat Dolls" lead singer has been rumored to be dating British crooner Ed Sheeran.

Lewis, on the other hand, has been linked with Rihanna after they were spotted hanging out together on several occasions. A photo shared by IOL Tonight shows RiRi and Hamilton together in July during the carnival festival at Rihanna's home island of Barbados.

However, Lewis has since squashed rumors of dating Rihanna and said that they are really just good friends. E! News caught up with Hamilton on the red carpet during the MTV Video Music Awards on Aug. 30, where he was asked about the real status of his relationship with Rihanna.

"You know, I've known Ri for a long time. We've been friends for a while we get to hang out every now and again. Otherwise, we're just good friends," he said.

Regardless, Sharon Bellamy Thompson, who IOL Tonight calls as Rihanna's "second mom," only has good words to say about Lewis. She expressed her approval for him to marry Riri, since they would reportedly make "beautiful babies."

"As long as this man makes her happy, he's got my approval. You've got to love his British charm. I saw her at the carnival [in Barbados] and Lewis is so handsome," Thompson said, according to the IOL Tonight report.

Meanwhile, it's believed Nicole has also moved on from the breakup, which according to Daily Mail, was brought up by the pressures of a long-distance relationship. Following the split, the former "X-Factor" judge had opened up to The Sun's Dan Wooton (via Daily Mail) about wishing only nothing but the best for Lewis.