Linda Carsini, a photographer for Jonathan Jackson's Vegas casino, was related to Adrian Carsini and his half-brother Enrico ("Ric"). Adrian Carsini was a fanatic about wine who managed the Carsini Vineyards in California, while Ric was an irresponsible playboy who owned the land upon which the vineyard was located.
They weren't closely related, not that Linda would have had any stake in the Carsini Vineyards. At best she may have been a younger second cousin. But it's pozz'ble, just pozz'ble, that once both of the Carsini brothers were no longer able to manage the estate themselves, Adrian instructed his lawyers to put her in charge of the vineyard's conservatorship. (Then again, he may have been forced to sell it to the Merino Brothers in order to pay for his legal defense.)
But if she was given control of the estate as the only other blood relative, then Linda did quite well for herself after her involvement in that casino heist.
'Banacek' - "A Million The Hard Way"
'Columbo' - "Any Old Port In The Storm"