Yes there is parasailing, its not through the resort, there is a vendor that walks the beach asking if you want to parasail or the boat will pull close to the swim area and you can talk to them. A word of advise...only talk to one or the other about the price. I got one price from the guy on the beach and another from the boat captain. It is fun and the view is great!
We go to Captain Quality every year at CSA for parasailing. Not sure if he goes to Couples Negril but I THINK he does. You will see him.. .always in a yellow hat and shirt strolling the beach. It is amazing and WORTH THE MONEY!!!!
A few years ago we went with another coupe and negotiated a rate of $80.00 per couple for tandem rides. They picked us up right on the beach at CN. It was a great experience. I think the boat drivers were expecting tips but we didn't bring any extra cash, so keep that in mind.