Rukmini, who claimed to speak eight languages fluently, sang songs from the various countries around the globe.
By the late 1970s, she was the sole owner of Frankenburg Import-Export Ltd., a Kansas corporation registered in Mexico as a middleman-supplier of steel products to that country.
In December 1978, Petroleos Mexicanos, "Pemex", Mexico's national oil company, accepted her bid to supply some 93,000 meters of steel oil field pipe, and in March 1979 forwarded Frankenburg-Kansas a purchase order requesting various types and quantities of pipe for which Pemex was willing to pay approximately $5.2 million.
In March 1986, she was convicted by a state court in Houston, Texas, of failing her fiduciary duties in brokering a deal between Pemex, Mexico's national oil company, and the Nissho-Iwai American Corporation.
A few days later, she surrendered to the authorities, turning herself in before a state district judge in Houston, Texas and saying she fled after the conviction because she panicked and became ill.[6] She is listed as a contributor to the presidential campaign of George H. W. Bush in 1987.