Use
Pay Exchanger service, it's the most reliable and best service in Pakistan. They give you best rates:
150 USD PayPal = 15000 PKR ( Rate = 100 + 0 $ Fee)
The process is simple. Create an account, go to
https://www.payexchanger.com/buy.php and enter required PayPal dollars. It'll automatically convert.
They will send you their bank account details, transfer them cash in PKR and they'll send PayPal dollars to the mentioned email. Simply give your cousin's email.
Pay Exchanger is trusted, experienced them.