Is it permissible for the wife to go to her husband’s house and stay there overnight sometimes, while she is still living in her family’s home and her wedding has not yet taken place, even though the marriage was publicly announced and celebrated previously?

If a woman's marriage contract to a man is legally concluded, she becomes his wife, and whatever is permissible between spouses becomes permissible for them. There is no objection to the wife going to her husband and staying with him, but the prevailing custom or the condition that delays consummation should be observed if the wedding has not yet taken place.