Model Amber Rose has been left disappointed after Wiz Khalifa reportedly ditched plans to look after their son.

The busty beauty took to Instagram on Friday (11Mar16) to share her annoyance at her ex-husband, who seemingly changed his mind to spend the weekend (11-13Mar16) with three-year-old Sebastian.

She didn't mention Wiz by name, but instead shared a meme with her 10.1 million followers to convey her feelings.

The viral image was actually a photo of British singer Tulisa Contostavlos, who is pictured crying, red faced and puffy-eyed. The emotional snap was a screen shot of the N-Dubz star during her stint as a judge on Britain's The X Factor in 2012.

Amber appeared to be oblivious to the identity of the woman in her meme, which featured the words: "When she plans her whole weekend around her babyfather (sic) taking the kids, and last minute he says, he's not coming".

"Happy Friday!," Amber captioned the post.

She did not elaborate on her personal issues, but fans were quick to recognize her struggle, with one asking, "Wiz acting up again?"

The model and rapper Wiz parted ways in 2014 after just a year of marriage. They subsequently became embroiled in an online war of words over custody of young Sebastian, with the Black and Yellow hitmaker accusing his estranged wife of keeping their boy away from a birthday party he had planned at his home last year (15).

They patched up their differences last spring (15), and Amber, who previously dated Kanye West, went on to praise Wiz as her only real love.

"He was the love of my life. He was the only man I've ever loved," she admitted on the podcast Guys We F**ked in January (16). "We obviously loved each other so much, and we still love each other. Even when we talk on the phone now it's always like, 'OK, babe, see you later. I love you.' We just can't be together. We aren't good in a relationship."

Amber is currently dating Toronto Raptors basketball player Terrence Ross.