Express Annulment (less than a year)

[XTO]

Need help guys, esp with knowledge to these matters.
My cousin’s notification letter dated Mar 5, 2006 arrived. that a visa number is currently available (for US immigrant) and it says that she should reply within 1 year from the date. She was petitioned as single but she’s already married now. She’s considering an annulment for the future of her 3 kids, her husband knows about it and he’s willing to go to the process since it’s only annulment for convenience.
My cousin has contacted a consultant of a certain group of lawyers for a a certain amount (my cousin won’t disclose) Is this possible to materialized in less than a year? Any suggestions please. TIA