Just wear it to the rehearsal

A couple was getting married, and it was only three days before the wedding. The bride Vivian calls her mother Elizabeth with some bad news. "Mother," Vivian says, "I just found out that my fiance's mother has bought the exact same dress as you to wear to the wedding." The bride's mother thinks for a minute. "Don't worry, Vivian" Elizabeth tells her daughter. "I'll just go and buy another dress to wear to the ceremony." "But mother," says the bride, "that dress
cost a fortune. What will you do with it? It's such a waste not to use it." "Who said I won't use it?" Elizabeth asked. "I'll just wear it to the rehearsal dinner."