Both you and your wife if otherwise qualified should explore employment based immigration as a possible means of getting green card because, there is not much your mother can do for your green card in the near term. There is no provision for visas for married adult children of green card holders. and if your mother becomes a US citizen, she may file for you under the third family preference category F3 [married son/ daughter of a US citizen] Visas in that category have long waiting times. 11 years. There may be other options for a faster way to get a green card, but you must speak to an attorney.
Answered on Apr 07th, 2013 at 9:31 PM