Ariana Grande and Big Sean
Singers Ariana Grande and Big Sean perform during the taping of "A Very GRAMMY Christmas" at the Shrine Auditorium in Los Angeles.Reuters

Ariana Grande and Big Sean might be on the brink of a break up as several reports claim that the couple is finding it difficult to iron out some kinks in their romance.

Their relationship is reportedly strained by the fact that both Sean and Grande are insecure, and jealousy is said to have further weakened their bond, according to a HollywoodLife source.

"Ariana and Sean both get jealous sometimes," the source said. "They are still a couple but not as strong as they once were. Sean has also told buddies that they're having some issues. They have some issues and might break up because of them but they are still a couple."

This comes close on the heels of a Star report claiming that Grande has broken up with Sean after she found him sexting other women. And according to Media Takeout these women are popular Instagram models, and Grande is believed to have split from Sean immediately before Christmas.

"During the last visit they had together, right before Christmas, Ariana reached for Sean's phone and he about jumped out of his seat," a source told Star, according to HollywoodLife. "She questioned why he was so jumpy, and insisted on seeing his phone."

"He tried to play it off and swears he hasn't hooked up with anyone since they became official, but Ariana was devastated. She couldn't believe the sort of things she saw them talking about to him!"

Grande's representative has quashed these split rumours, but this is not the first time Sean has been accused of cheating on his partner. "Glee" actress Naya Rivera was reportedly doubtful of Grande-Sean relationship when she was engaged to the rapper.

"It's her worst nightmare because she was always sure that Sean was cheating on her with Ariana, they fought about that a lot," another source told HollywoodLife. "Sean would tell her she was crazy and jealous, he swore to her that Ariana was just a friend, he even said she was like a little sister."