What is the ruling on a mother breastfeeding her child who is two years and four months old, when she has no milk?

It is permissible to extend breastfeeding beyond two years if both parents agree and it does not harm the child. However, extending it is forbidden if either parent objects or if it harms the infant. The breastfeeding that establishes kinship (maḥramiyyah) is only what occurs within the first two years, and breastfeeding after two years is not considered.