Rom's first marriage began when he signed a standard five-year contract with Prinadora's father to produce a child. He then made the mistake of falling in love with his wife. As a result, he signed an extension to the contract without reading the fine print, allowing Prinadora's father to cheat him of all his money. Prinadora eventually left him for a richer man. (DS9: "Doctor Bashir, I Presume")
Background information Edit
Lolita Fatjo played Prinadora in "The Ferengi Family Hour" with Max Grodenchik, Aron Eisenberg and Chase Masterson at conventions. Part of the performance comes from the unfilmed scene from "Change of Heart" where Prinadora comes to Deep Space 9 to get Rom back. 
Prinadora appears in the third novel ("Satisfaction is Not Guaranteed") of Worlds of Star Trek: Deep Space Nine, where Nog visits her after accusations that Rom broke the marriage contract threatens his position as Grand Nagus. Nog leaves when she fails to even recognize her son, commenting later on to Ro Laren that Leeta has been more of a moogie to him than Prinadora. The accusations that Rom broke the contract are later at least partially resolved when Ro points out that, under the Rules of Acquisition, "A contract is a contract is a contract, but only between Ferengi", reasoning that Rom's second marriage was a Bajoran ceremony and so does not 'count' under Ferengi law.