Is refusing to marry a maternal uncle's daughter—in order to avoid the negative consequences of consanguineous marriage—considered disobedience to the mother who requests it?

Filial piety and obedience to parents are obligatory in matters of good and righteousness. It is not considered righteousness to force a child to marry someone they do not desire, especially if she is a relative, as this could lead to the severing of kinship ties. Therefore, it is not obligatory to obey the mother in marrying the maternal uncle's daughter, and refusing this is not considered an act of disobedience. The child should gently persuade and appease the mother.