Tyga Kylie Jenner
Kylie Jenner and Tyga went public with their relationship in August 2015 after her 18th birthday Frazer Harrison/Getty

The relationship between Kylie Jenner and Tyga may have taken a serious turn. The Rack City rapper has sparked engagement rumours after referring to the E! reality star as his "fiancee" in a Snapchat video.

In the short clip shared on Jenner's Snapchat account on 23 September, the 18-year-old can be seen wrapping her legs around Tyga, 25, who says: "I don't f**k with nobody, it's just me, my fiancee, this lil' dog I just got." Fans quickly assumed the hip hop star was suggesting he had popped the question but TMZ reports that he may have been reciting an old interview with rapper Logic.

In the undated interview which Tyga posted on his Instagram earlier in the day, Logic says a similar thing telling the reporter: "I don't f**k with nobody. It's very simple. I stay in my house with my fiancee and my little puppy I just got. I don't f**k with nobody, I don't go to parties, I barely go outside."

The couple have been subject of engagement rumours several times in the past. The Keeping Up With The Kardashians star was forced to deny the claims in July 2015, telling her Twitter followers: "Not planning on getting married anytime soon." After months of silence, Jenner and Tyga confirmed their relationship in the music video for his single Stimulated, shortly after she turned 18 in August.

Reports have emerged that Jenner is responsible for forcing Tyga to cancel his tour in Brazil. Local organisers are said to have blamed the TV star in a statement released to the Mail Online, which reads: "The tour of rapper Tyga was cancelled. Tyga, who already received the contractual agreements met by directors, claimed by means of his office that he's not attending his Brazilian shows due to his current girlfriend, media personality and socialite Kylie Jenner — the youngest of the entire Kardashian family."

Their relationship has also been rocked by cheating allegations with a Miami rapper named Stitches claiming to have slept with Jenner after her birthday. In an interview with InTouch magazine, the rapper, real name Phillip Katsabanis, alleges: "I had sex with her. We did it all." IBTimes UK has contacted Jenner's rep for comment.