The poor thing was so weak that she literally couldn't stand up to run away. I picked her up and took her to aspiring crazy cat lady #1 Marine Daughter for resurrection. Headed back to work and the other "something" was back in the road looking for little sister. I let him run down the road until he was so tired he couldn't run anymore, stopped, picked him up, and took him to Daughter's house.
Two days after I captured these two we found the momma cat dead alongside the road not far from where the kittens were. There wasn't any sign of her being hit by a car or dog chomped. I expect that she was just worn out from a life of scrounging for food and having kittens two or three times a year.
Warmed up, dried up, bellies full, ticks removed, and much happier than they were the day before.
Mrs. Augie and I are going to take these two to our house once they size up a bit. We have four cats now - only one of them less than 10 years old. It will be good for them to have somebody new to play with.