Okay, so i need to ask for some more specific information. The way i am reading it at the moment, it sounds as if this child has been completely unknown to the sister's boyfriend until the court case has arisen. So, assuming that it actually IS his child, then the ex would have to have been pregnant at the end of their relationship. Which means that after they broke up, she did not tell him about the child, but continued to have it anyway. Now, call me crazy, but right THERE, that should automatically remove him from the picture concerning her ability to demand money off him in court. but it doesnt.
And if it isnt his child, why the hell should he be forced to acquire a good lawyer? Why is it okay for the courts to automatically side with the female? Which is what the laws are doing.
I can't offer any advice, except perhaps surely, even though she didnt need a DNA test, he can demand one to prove the paternity?