It’s okay, it depends on whether the owner wants to stop it. Cats that step on milk are mostly cats in the growth period. Because they need to use their claws to use force when sucking milk, they will also step on milk later. Stepping on the cat's breasts means that the owner regards the owner as a mother and expresses trust and love to the owner; in addition, stepping on the breasts is also a way of expressing missing the cat's mother, and the owner can comfort the cat.