Don't be messing with British supermodel Naomi Campbell if you want to keep your job.

That's a lesson aspiring model Luo Zilin seemed to have learned after her management company dropped her following her frolicking weekend with Campbell's ex-boyfriend, Russian billionaire Vladimir Doronin.

MIX Model Management NYC President Neal Hamil said they were terminating the model's contract effective last week due to "unprofessional conduct" and "unacceptable work ethic."

Luo Zilin, also known as Zi Lin, was mentored by the 42-year-old Campbell on the reality show, The Face.

The 25-year old Chinese model, according to sources, is reportedly dating Campbell's ex-boyfriend, busines mogul Vladimir Doronin.

The couple was recently seen on a passionate outing at the Spanish island of Ibiza.

In the photos released by MailOnline, Luo Zilin is seen straddling Doronin as they basked in the sunshine of the Spanish island.

Other photos show the couple in intimate moments, canoodling and kissing, sharing a good laugh and enjoying the island aboard a speed boat. .

According to a source, it was through Campbell that Zilin and Doronin met each other. So it's "really unprofessional of Luo and it's not great behaviour on Vlad's behalf," the source said.

The mentor and the student reportedly shared a good friendship having been on the same team in the reality show.

The statuesque Chinese model even greeted her teacher on Twitter last May 22. "Wish you have a great birthday xx," Zilin tweeted.

Campbell was in a complicated on-off relationship with Doronin for several years. They broke up just as the Russian billionaire was becoming a permanent fixture in New York's social circuit.

Doronin, who is still legally married to his Russian wife Ekaterina, apparently loves the social scene. He has been described as a serious and industrious businessman, but at the same time delights in the spotlight, living the life of celebrities and mixing with the "It Crowd."

He has been seen lounging around beautiful women, like Miami model Jazzma Kendrick who was spotted with him just weeks ago.

Now he's on a European tour with good friend Leonardo DiCaprio whom he followed in Venice where the 38-year old actor is vacationing with rumoured new squeeze Victoria Secret model Toni Garrn.

Just last month, MailOnline talked to a source who couldn't believe the sudden turn of events in Campbell and Doronin's relationship.

"It's incredible, they were talking about babies and marriage before Christmas and they were so in love, so it's quite shocking that things have gone downhill so fast."

Some sources, however, say that the Brit model and Russian billionaire's complex on-off relationship is more like a convenient business arrangement in many ways.

"Naomi brings glamour to his hotels and properties, and he treats her extremely well. But they spend a lot of time apart due to work commitments," a source told MailOnline.

The last time Campbell and the hotel and real estate tycoon Doronin were photographed together was in March while vacationing in Miami beach.

Meanwhile, Zilin, a six feet-tall model who was born in Shanghai, China, was crowned in 2011 as Miss Universe China, She joined the modelling reality show, The Face. under Campbell's team.

The Face is a reality show created by the British supermodel where she is seen going up against supermodel colleagues in discovering new faces to join the fashion world.

Zilin finished runner up in the show after she became the last girl standing on Campbell's team.