Meecho became mom 3rd Time

Meecho is my cat. On 3rd Aug she gave birth to six kittens. wow. That was first time that I saw a cat giving birth to 6 kittens. Her grandmother gave birth to 5 kittens maximum. Even Meecho had 2 kittens first time. 4 second time and now 6 third time. But unfortunately four of six are no more. One of them was killed by a street cat. After that she got afraid and she moved remaining two kittens to neighbor opposite our house. Now she comes our house to eat and then goes back to her kittens.