A woman stands accused of assaulting and kidnapping her mother in a "disturbing and somewhat bizarre" incident linked to the ongoing fallout of her relationship with a former high-flying stockbroker.

Royalene Pollock, 68, suffered a suspected broken rib and facial cuts after she was allegedly bashed and tied up by her daughter, Lauren Pollock, in the older woman's Cherrybrook home about 3am on Sunday.

Former BRW Rich Lister Phil Mathews. Credit:MATHEWS CAPITAL

Hornsby Local Court heard on Monday that Lauren Pollock, 37, and Afghanistan war veteran Daniel Mark Cupples, 39, are alleged to have kidnapped the elderly woman and taken her back to Pollock's home at Naremburn.

By 5am, the victim was taken to a home in Mosman where she raised the alarm to a resident, but only after allegedly being told by her daughter to go inside.