If a dna test comes back 89%, and possibly another
 

family member could be the father, does it prove paternity? A dna test came back with results of 89%, is there a possibility that another family member of the presumed father, being the father? Is that enough certainty to have to pay child support? Should other family members be tested?

If there is a possibility of another father, they should be tested...Unless the DNA came back 99.9%, the highest possibility, I would have the other possibilities tested..