You have a queen, Chloe, who has had kittens and another cat, Po, who comes and and wants to feed those kittens - is that correct? If Po has had kittens of her own recently, she will be in milk and will be able to feed the kittens. If Po does not have milk then the babies are wasting time and effort by suckling on her. The babies are best off suckling from their own mother who can provide them with milk, so that they can continue to grow and thrive.
Edit: I have just read about Po and Chloe in your previous thread and see that Po has older kittens - her milk will not be of the same consistency as Chloe's milk because Chloe has younger babies but Po will be able to feed Chloe's babies.
best purrs
