Two sisters in North Dakota have filed a lawsuit after a DNA test revealed that the man they had always believed to be their biological father was not, according to the claim. The women say the discovery has upset their understanding of their family history and has prompted legal action, though the full details of the case were not available in the material provided.

The available article text did not include the substantive reporting on the case, such as the identities of those involved, the specifics of the alleged wrongdoing, or the current status of the lawsuit. As such, this summary reflects only the limited information conveyed by the headline and URL, and further details would be needed to give a complete account of the sisters' claims.