The lady Lindsay Lohan called a 'Russian hooker' in her rant to fiance, is planning to sue her for defamation

There are reports that Lindsay Lohan and her 22 year old Russian millionaire boyfriend Egor have parted ways following their balcony bust-up at her London apartment last week. Before then, Lindsay, who friends say has insecurity problems and constantly fights with her fiance over cheating allegations, posted a photo of her fiance at a party and said he was partying with a 'Russian hooker'.

That 'Russian hooker' is fashion designer Dasha Pashevkina (pictured with Lindsay above) and she says she plans to sue the star for the derogatory comment..

Dasha has spoken out in her own defense, insisting she's never slept with Egor.

'I've known Egor for five years and have never slept with him and never would,' fashion designer Dasha Pashevkina told The Sun. 'I'm the one who introduced Lindsay to Egor. We are just friends.

'Lindsay's insecurities mean she can't have any girls around him. Her behaviour is so volatile but honestly I did not expect this.'

Dasha also told The Sun that Lindsay threw Egor's mobile phone into the sea during the couple's recent trip to Mykonos after accusing him of cheating

'Lindsay had a meltdown as Egor went out with his London friends for dinner,' she said, adding: 'I'm taking legal action. She has a history of this and needs to learn a lesson.'