Mother and son in New Mexico face jail time for incestuous relationship

[Losty]

Tell me what the problem is.

Children of sexual relations between close relatives suffer from genetic defects and illnesses to a greater extent than normal children. There was this obscure family of Spanish nobles called the Hapsburgs who are a perfect illustration of what happens when each generation marries its first cousin. Google them some time.

This is not a valid concern. The risk of defects from one incestuous relationship is insignificant.