Kidnapping, yes... but the threat of being labelled “bigot” is not duress enough to force a reasonable person to comply. She wasn’t forced. She was guilted into it. The same thing happens constantly in every middle school in America. My black friends said it was the easiest way to get laid when they were in their teens. I wouldn’t be surprised if half of all white girls who have had only one sexual experience with a black male did it within hours of being asked, “What, are you racist?”
The totality of the situation could lead to rape and kidnapping charges. If the DA got tough with his brother, his brother would have been forced to offer testimony about the coercion. Testimony that a credible threat was made regarding leaving the room is sufficient grounds for charging one or both people. In the 1960s climate, this incident would never have been prosecuted. In today’s climate, it would be prosecuted if the woman was credible and insisted on prosecution.