i don't think so. he was supposed to be watching your son so if he damaged his Playstation then he should have been watching over your son more carefully or not play with it or something. it would be good if you pitched in a little bit of money to try and help replace or repair his Playstation though. I hope this helped:)
I would not pay him anything. You paid him to perform a service, watch your son. Had he been doing what he was paid to do the unit wouldn't have been damaged. Time to find someone else to watch something as valuable as your child!
I agree with all of the NO's ...why? very simple ..your cousin wasn't doing his job and plus I wouldn't trust him again..this time was the playstation next time is gona be the plasma TV lol no seriously don't pay him