Kylie Jenner and Tyga split because she could no longer trust him.
Kylie Jenner and Tyga
The 18-year-old reality TV star had been dating the 26-year-old rapper for two years but the pair called time on their relationship a few weeks ago with lack of trust blamed for the split.
A source told PEOPLE: "He was lying repeatedly to her face and she just couldn't take it anymore. She couldn't trust a word he said.
"They were fighting a ton over stupid, petty things over the last few months, and she was over it."
This isn't the first time the pair have split, with Kylie's older sister Khloe Kardashian, 31, previously admitting she found it hard to keep up with them.
She said: "I ask Kylie...'I think you were just somewhere for New Year's with him' and then like one day, they're not together. That's the life of an 18-year-old...So I stopped asking her, because it's confusing and I hate telling people, 'Oh, they broke up' and then all of a sudden, someone pulls in my driveway and I'm like, 'Oh, I thought we were done with this one.'"
However, they are believed to have ended the romance for good just a few days before the Met Gala was held on May 2 at the Metropolitan Museum of Art in New York City.
Both Kylie and Tyga attended the star-studded event but did not walk the red carpet together at the 'Keeping Up with the Kardashians' star's insistence, however, there were seen hanging out at the Balmain after-party.
After the "acrimonious" break-up, Kylie is said to have been angry that Tyga still took up his invitation to the Met Gala, something he only received because of his association with her.
Even if this split is final, Tyga will still be connected to the Kardashian/Jenner clan because he has three-year-old son King Cairo with his ex-fiancée Blac Chyna who is now engaged to Kylie's half-brother Rob Kardashian. The loved-up couple are also expecting a baby together.
Tagged in Tyga Kylie Jenner