If you do marry, you are more likely to get divorced:
In 2004, John H. Johnson examined data from the Survey of Income and Program Participation and concluded that gender has a significant influence on the relationship between work hours and increases in the probability of divorce. Women's work hours consistently increase divorce, whereas increases in men's work hours often have no statistical effect. "I also find that the incidence in divorce is far higher in couples where both spouses are working than in couples where only one spouse is employed," Johnson said. A few other studies, which have focused on employment (as opposed to working hours) have concluded that working outside the home actually increases marital stability, at least when the marriage is a happy one. But even in these studies, wives' employment does correlate positively to divorce rates, when the marriage is of "low marital quality." (Forbes)