Commercial event photos: models asking to buy?

I was hired to shoot youth sports photos for a commercial web property. We are getting releases signed by parents of the kids, and some of the parents are so excited about the shots that they would like to buy them. My initial reaction is that these photos belong to the client and selling them reduces the value of their photos to them. That said, my contract does grant me such use if the client agrees (they do).

Maybe I should just ask them what size print they'd like and sell it to them. What do you all think? I've always felt that I'd just use these types of images for my portfolio if I'm trying to get more similar work.

If the client agrees, and its a real agreement and not a grudging contractually agreement, then what's the concern?

gonzogolf wrote in post #17668127
If the client agrees, and its a real agreement and not a grudging contractually agreement, then what's the concern?

Yeah, now that I've typed it out, it looks like a silly concern. It just feels wrong that I was hired to do work and can now sell that work to others with minimal effort on my part.

I'm also in the software business, and this is a big part of the business model anyway: Get hired to deliver a product, and we keep the code, then we try to sell that code in other products to other customers.

If the client has grand uses, its unlikely that they care of mom and dad have a wallhanger.

waterrockets wrote in post #17668125
I was hired to shoot youth sports photos for a commercial web property.

What, may I ask, is a "commercial web property"?