Legal advice needed

Asking for a friend. If my buddy went on vacation to Risa last year and had a really fantastic time, even though (or maybe especially because) he got roofied with Kerkhovian serum and went on a six day bender on some cocktail of Deltan, Betazoid, and Orion genetic splices... exactly how much child support should I-- um, I mean he - really be responsible for?