Examples of negotiation in business: When approached by a partner whispering sweet nothings about untold riches and power, it can be tempting to rush through the negotiation process.

But if you do, you could find out too late that your Prince Charming is nothing but a frog—and that those glass slippers on your feet pinch. That’s how famed shoe designers Kari Sigerson and Miranda Morrison felt not long after inking their seemingly sweetheart deal with Marc Fisher, the scion of the 9 West shoe fortune, as reported by Jessica Lustig in the August 1 New York Times.

After graduating together from design school, the designers introduced their Sigerson Morrison line in 1991. Before long their tiny store in New York City had become a “destination,” according to Morrison, with supermodels and movie stars clamoring to get in.

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Throughout the 1990s and 2000s, Sigerson and Morrison was the high-end shoe brand to watch. By 2005, the designers had opened shops in Los Angeles and Tokyo, and introduced a lower-priced line. Their company was reportedly worth $30 million, and they began looking for investors to help them take it to the next level.

Through investment banks serving as matchmakers, Sigerson and Morrison were introduced to Fisher, who was cobbling together a mass-market shoe company. The high-end brand seemed an odd fit for Fisher’s more down-market company, writes Lustig. But Fisher made an offer that apparently dazzled Sigerson and Morrison: $2.6 million to acquire their company and the intellectual-property rights to its name. The founders each retained a 10% stake in the company and were hired as co-heads of design for seven years at an annual salary of $350,000 each, according to Lustig.

Examples of Negotiation in Business – The End of the Honeymoon

But the honeymoon was over quickly. Sigerson and Morrison soon came to believe that Fisher was knocking off their designs for his discount line. (Fisher has been sued twice for stealing other companies’ designs.) And the women objected to Fisher’s cost-cutting decision to move production from China to Italy.

On March 2, 2011, the designers were summarily fired. Three weeks later, Fisher sued them in New York State court for $1.95 million in damages, alleging they were late in delivering a collection of shoes. Sigerson and Morrison countersued, seeking $6 million in damages. They said Fisher had approved the late delivery, which they attributed to a factory mishap, and they also accused Fisher of sexual harassment.

Meanwhile, Fisher has put anonymous in-house designers in charge of the line. Sigerson Morrison shoes are now priced about a third lower than before. As for Sigerson and Morrison, since their deal with Fisher prevents them from designing under their own names, they are left working for other stores and designers, with little hope of reclaiming their names. They spend much of their time dealing with the lawsuit, which is in the discovery phase with no sign of a settlement.

“All I want to do,” Sigerson told Lustig, “is what I did.”

Regardless of how the lawsuit plays out and who emerges victorious, the story serves as a cautionary tale for any business negotiator who is considering a new partnership with someone unfamiliar. Take big dollar signs and even bigger promises with a grain of salt. Spend time getting to know potential partners, talking in depth about your dreams and what each side brings to the table. Research their reputations thoroughly. If you do get to the contract-drafting stage, have a good lawyer vet it carefully. Above all, if the shoe doesn’t seem quite the right fit, don’t wear it.

Discover how to improve your dispute resolution skills in this free report, Dispute Resolution, Working Together Toward Conflict Resolution on the Job and at Home, from Harvard Law School.

Originally published May 2014.