1. Non disclosure of material information like marital status is grave indiscretion for which she may be alter departmentally proceeded against.
2.If you do not wish to inform this in public then delay your marriage registration but under no circumstances hide this material information in her job application form.
3.Since both of you are agreeable to marry a each other,there is no hurry to marry just now. Let her fill up the form in unmarried status and after submission marry her.
Good luck.