Paternity

under question.

I got an email stating that paternity is under question (foster son was swabbed today). However, can anyone tell me what this would mean: "father is still the legal father, we are trying to figure out if he is the biological father"? If he is not the bio dad, how is he the legal father? Because his name is on the birth cert?

I am also not sure how long results take. Any ideas? If the answer were that dad is not bio dad, it would change the situation on so many levels. One one hand, would now-assumed bio great aunt still pursue him if there was no bio? On the other hand...well, there would be an infinite number of possibilities that could mean an infinite number of months waiting.