Naturalization, Citizenship How to attain Citizenship?

[MRoyal]

Thank you for reading my inquiry.. My wife has lived in Los Angeles for about 22 years now. She's originally from Mexico, and has family members (siblings) that are U.S. citizens. Making a long story short, we got married in April of this year. Does marrying me have any effect on whether she can get her citizenship quicker or easier? I don't have that much information on this subject. Does anyone know how much it costs to get this done? It bothers me that she is still "illegal". What can I do to help her? Thank you for your time...