It was only a matter of time — a week to be exact — before the beef started brewing again. Blac Chyna, 26, has reignited her social media war with Kylie Jenner, 17, on Instagram. In her most recent photo, she's seen flaunting the diamond-covered watch she received from the Keeping Up With The Kardashians star's boyfriend, Tyga, 25.

The model, who has a son with the rapper, shared the selfie with her Instagram fans on 31 March. She didn't leave a caption, but it's not as if she needs to comment - because the shade she's throwing rings loud and clear.

The watch was given to her by Tyga in 2013 when they were still together.

It is the second time the two women have fallen out over their watches. On 24 March Blac Chyna posted a photo of her sparkling timepiece with the caption '#BlacLove'. Just a few hours later Kylie appeared to retaliate by posting a picture of herself wearing an almost identical watch from Tyga, with the word: 'Currently'.

Isn't it time you two stopped fighting over a man?