I still have this beautiful family, a mother with her 3 kittens who are already close to 6 months old. They have only a few days left to spend together as in a few days they will all go to their families. The females are all spayed, also the mother but she is still nursing them! The kittens are almost as big as she is and they are still eating milk from her. She is good mommy and she accepts this.
Not all cats let their kittens to eat from them for such a long time, but she is a good mother and she accepts this. But as I said in a few days they will go to their new families so they have only a few days left to enjoy this baby thing.