So, my estranged father demands a blood test to prove I'm not his son, unfortunately for me I probably am.

I'm not quite sure how to react to this, I could just accept and get it over with, not giving him the satisfaction of ordering a legal chase up for it, or I could hold out for as long as possible to make him spend as much money as possible on said chase.

Ideas anyone? I honestly laughed my head off when my mother told me this news.