Stewart's nuptial plans enrage Hunter

Rachel Hunter. Herald file picture

New Zealand model Rachel Hunter reportedly plans to sue estranged husband Rod Stewart for 35 million pounds ($91 million), estimated to be half his personal fortune.

The Sun says Hunter "flew into a rage" when reading in that London tabloid that Stewart was engaged to marry Penny Lancaster.

Hunter, 35, and 60-year-old singer Stewart have two children from their nine-year marriage which ended when she left him in 1999.

They are understood to be in the final stages of their divorce, but The Sun reports a friend of Hunter saying she was "upset and humiliated" when she found out about Stewart's marriage plans.

"She is now determined to make things difficult for Rod over the divorce," Hunter's unnamed friend said.

Stewart proposed to blonde fitness instructor Lancaster, 33, at the top of the Eiffel Tower in Paris earlier this month, according to his record label BMG.

The engagement was announced two days before Hunter made her British television presenting debut on reality show Make Me a Supermodel. She is also modelling for the Ultimo underwear brand -- a contract on which she replaced Lancaster.

- NZPA