Rescuing newborn kittens is a difficult task under any circumstances. They are so small, so fragile, and in need of so much help. But, it's even harder to do when their momma is around. Now, normally, you wouldn't want to 'rescue' cats whose momma is taking care of them, but this case is a little different. The poor kittens almost froze to death in a puddle because the weather was so bad, and the mom cat, even though we later could see how great of a mom she is, unfortunately, could not do all that much to help them.
So, the kittens were rescued and taken care of by an absolutely lovely human, the momma was brought in as well. The problem is that feral cats don't trust humans very easily, and this mom certainly didn't. So, when the babies were warm enough, they were reintroduced back to the mom, and her reaction was so precious, after seeing her aggressive behavior with the humans, it was almost hard to believe.