Reported by Erica Butler:

The dress.  This simple, two-word item captures the  arguably single most important - and emotionally fraught - task on a  bride-to-be's to-do list.

After Alix Genter, a graduate student at Rutgers University in New Jersey, found her perfect dress last summer, the task of planning her wedding became even more stressful when the owner of the shop  allegedly called her and refused to sell her the dress because of her sexuality.

"She said she wouldn't work with me because I'm gay," Genter told Philadelphia Daily News columnist Ronnie Polaneczky.

Donna Saber, owner of Here Comes the Bride, in Somers Point, N.J., told ABC News that she only asked Genter why she crossed out "groom" and replaced it with "partner" on her order out of curiosity.

"What Would You Do?" traveled to a bridal shop in New Jersey to see how bystanders would react to such a scenario. Emotions ran high when our actress, Margaret, picked out a dress she liked but was told the shop would not sell her the dress because she was a lesbian. Did fellow shoppers support the shop and add their own anti-gay sentiment? Did they keep quiet or step in to defend her?

Watch the full scenario on "What Would You Do?" TONIGHT at 9 p.m. ET.