Mom cat feeds the adopted kitten instead of her own

The cat Jaco recently gave birth to three kittens - Willie (white), Coco (red) and Butuz (white and black).
kitten Kira is not a native kitten, but an adopted one. She is older than the kittens of the cat. The first day the adopted kitten was afraid to approach the cat and played cautiously on the sidelines. But then she realized that the cat has milk. And now there is not enough room for her own kittens - after all, Kira is ready to close her new mother-cat with herself. Cute kitten reaction

For those who write why the cat is dirty. She came to us a week before giving birth. The cat was very very scared. We tried very hard not to disturb her again. After all, if you choose between the calmness of a mother cat and not wiped eyes, then it is better to choose the first.