ANSWER:

If your sibling married a nonmuslim, this means they are living in zina and you must not congratulate them for this! If she believes that what she had done is halal, she is an apostate and you must not have anything to do with her as she is a kafir.

What should I do if a sibling marries a non Muslim and has a child with him, am I allowed to visit the child or congratulate my sister?

Apostasy, Invalid Marriages |