Kylie Jenner buys Tyga a promise ring

Kylie Jenner has bought Tyga a promise ring.

The 19-year-old beauty was overcome with emotion a few months ago when her beau splashed out on a diamond sparkler as a sign of his commitment but she’s now returned the gesture by getting him a huge rock for his finger.

Taking to her Snapchat account on Thursday (09.08.16), the blonde beauty uploaded a photograph of their glitzy jewels and accompanied it with: "If this is my promise ring I wanna know what my engagement ring gonna look like. (sic)"

However, the sweet shot hasn’t just confirmed how serious their relationship is as the couple – who announced they were dating last year – have also poured cold waters on rumors suggesting they’re engaged after Kylie initially decided to place the expensive ring on her wedding finger.

However, the ‘Keeping Up With the Kardashians’ star’s family don’t think it’ll be long before the on/off pair take their relationship to the next level and are concerned Kylie will run off to get married to the 26-year-old rapper in secret.

However, Kylie’s mother Kris Jenner doesn’t mind if her daughter gets hitched to Tyga but just wants to make sure she secures her finances beforehand with a pre-nuptial agreement.

A source said recently: "The couple have even talked marriage and Kris’ biggest panic is that Kylie might do something stupid, like elope without a pre-nup."

But the family’s concerns are causing tension between Kylie and her sister Kendall Jenner as their mother has asked the model to keep an eye on her younger sibling.

The insider explained: "She’s asked Kendall to keep an eye on Kylie and discourage her from doing anything rash."