What is the Ruling of a Bride who skipped Maghrib Prayer on her Wedding Night?

This is not permissible. What is obligatory upon the woman is that she prays Maghrib and Ishaa as well, since she asked about Maghrib even though Ishaa is more likely to be left off. However, it is obligatory that she prays Maghrib and Ishaa. And it is not permissible for her to delay it beyond its time, because it contradicts being thankful to Allah the Exalted for the blessing of having a wedding/marriage. So, it is obligatory that she fulfills the obligations that Allah has mandated upon her. She will not miss any of her goals in marriage.