Ronnie Wood was unfaithful to Ekaterina Ivanova, she has claimed.
The Rolling Stones rocker, who left his wife Jo to be with the 21-year-old Russian waitress in July 2008, sent a series of flirty messages to other women as their relationship began to crumble.
Ekaterina - also known as Katia - said: "He'd go for coffee with women he'd only just met. I found it weird.
"Once I found a text from a PR woman he'd just met. It said 'Okay then' followed by about a million kisses and a horny devil symbol. I don't know if anything happened between them but it may have."
That was not the only time Katia - who split with Ronnie after he assaulted her in December - found evidence of his infidelity.
She added to The Sun newspaper: "I got home from a weekend in Scotland and there were bottles and glasses everywhere. It was obvious someone had been there but he swore not.
"Other times he'd be doing a flirty voice on the phone and I could hear a woman's voice on the end of the line. He'd deny that he'd even been on the phone. He'd tell me I was going nuts."
Despite her tempestuous relationship with the 62-year-old musician, Katia insists she and Ronnie are "still friends".