'Con artist' fleeced lovelorn older gents

A Sydney woman used online dating services to fleece lovelorn older men of their life-savings and then splurged the cash on a new house, luxury cars and plastic surgery, police allege.

The 39-year-old single mother of four, was arrested at her home in Miller, southwest Sydney, on Thursday and charged with several counts of fraud and money laundering.

It's alleged she used website dating services to strike up relationships with four men aged in the 60s and 70s.

She then allegedly used sob stories, including about sick or dying relatives, funeral expenses and bank fees to persuade the men to part with huge amounts of cash.

One man transferred her $1.9 million.

The other three alleged victims, including an interstate businessman who is said to have spent time with the woman at a north shore apartment, paid her $190,000, $58,000, and $12,000 respectively.

She blew the cash living the high life, police will allege.

"I'd describe it as an extravagant lifestyle," Detective Superintendent Arthur Katsogiannis told AAP.

The woman acted alone and ran the alleged scam between 2008 and the day she was arrested.

Det Sup Katsogiannis said the woman may have had more victims and urged anyone who felt they'd been conned to come forward.

He also expressed hope that the alleged victims would get some of their money back after sports cars and other items were seized from the woman's house.

Police also froze more than $1 million in cash and assets linked to the woman.

The woman was granted bail and is due to appear at Liverpool Local Court on June 25.