Reality TV sensation and cosmetics guru Kylie Jenner allegedly thought Travis Scott was speaking to other women in the run up to their 'split.'
The couple are thought to have gone their separate ways last week after arguments about how much time they spend together.
They share one year-old daughter Stormi.
A source claimed: "Kylie and Travis are both so busy with their careers and parenting Stormi that they barely ever spent time alone together.
"Travis has his own group of friends, his own apartment in the middle of Hollywood, and was always in the studio or off on tour.
"Kylie would offer to visit but even on tour he'd barely have time to see her."
The source added that Kylie's plans for the trio as a family weren't helped by their hectic schedules.
"She wanted them to get married and have another baby," the source said, "but it was a struggle to even spend one evening together, let alone plan for the future.
"Kylie has been cheated on in the past, so was always worried when he'd take a phone call outside the room or was secretive about his phone.
"I know she accused him of speaking to other women, which he denied, and even let her see his phone.
"Everyone in the family is really sad they've split, but think they'll get back together because they really do love each other."
Kylie, 22, and Travis, 28, reportedly agreed to a 50-50 split of custody of baby Stormi.
Amid the split rumours, Kylie was spotted with her ex last night, rapper Tyga.
Despite the reports, some fans insist that the break-up is being staged by Kylie and Travis.
They reckon that it could be an attempt to boost the viewing figures of Keeping Up With The Kardashians or album sales for Travis.
One fan speculated the plan could have bee hatched by Kris, Kylie's mum and the Kardashians'/Jenners' manager.
