Not sure what to do....call the Humane Society from a pay phone and ask their advice?

Or, ask your vet, if he/she is a wise and trustworthy sort.

I agree, them being outside is not good...

If thye live in a modular home, maybe the income there isn't that high? If the owner was re-educated, would you be willing to pay for the mom's spay and getting the other two kittens their checkup...and returning them?

It's a tough call - some people honestly don't know, and didn't realize what they were doing.

I think it was Catnapper whose neighbours happily took their young male in to be surgically "re-educated" once they got information?

Hopefully you'll get more feedback here - maybe the Humane people would talk to the owner for you.

The owner WILL be very worried that they disappeared off the front porch...I am sure they had no idea that they were out in the middle of the road at night.

I think they deserve a chance to change. Do you feel okay about telling them?

Something like: "Your cat and 3 kittens are okay. We saw them in the middle of the road the other night, and rescued the one kitten because of traffic.
We have the rest of them because we are afraid they will get hit by cars as they are outside all the time." Then tell them about the condition of the one kitten.

Something like that.

Again, tough call. I do think the owners should KNOW.