In US:
#1. Inform your company not to provide any infomration about your salary. Most probably they won't do and also against US laws.
#2. Don't worry about Indian emmassy they are just sh*t in US.
#3.Collect all evidences /bank statements of your wife and infomr Indian embassy requesting filing a complaint under IPC 406/420 ( discuss with lawyers in india) and also send copy of NRI section /DCP/Commissioner of your area to take necessary action. Inform local police of your town with copy of same providing all details of your wife (SSN /TIN etc)
#4.Inform US embassy in India /US Immmigration and ask them to cancel her visa.
In INDIA-
Appoint lawyer and follow his advice.
Ask your wife by sending notice to return your money based on statements.
If possible come back to India and clean this dirt otherwise it will be diffcult to face problem also if you stay in US those beggers will open big mouth.
And TRUST me if you have all proof's (bank statement, police complaint in US against wife etc) Indian courts are very fair.