Adopting a child - impact?

Re: Adopting a child - impact?

If you breastfeed a child your sister adopted, he/she is mehram for your children and not your sister’s children. The child will be like a cousin to them.
Also I am pretty sure Khalu is also non-mehram. The only mehram person for the child in that house would be your sister i.e. khala.

An example, if your sister has only boys, she can adopt another boy, you breastfeed the child and the adopted son will be mehram to your sister.