Wife's name after marriage

Greetings!

My name is N.Naveen Gift. I recently married my wife Mary Ann D'Souza. I have a question. So now since we are married will she share my initial?

I mean will her name be - N. Mary Ann D'Souza 

or

Mary Ann Gift?

or

N. Mary Ann Gift?

Or should we make any extra affidavit or anything for that?

Thank You.