My daughter has been a Permanent Resident for about 2 years. She also has been married for over 4 years to an American citizen with 1 child born in the USA and is expecting another baby for next July. Once talking to an immigration officer he mentioned once she has a 10 years Green Card, she could apply for citizenship sooner than 3 years as a Permanent Resident once she has all evidences that she has a legit and stable marriage (over 4 years) and 1 American child going for her 2 American born baby . Could that be true???
Have anyone heard about this possibility????

YES ITS TRUE. ONCE SHE COMPLETES HER 3 YEARS AS PERMANENT RESIDENCE SHE CAN APPLY FOR HER CITIZENSHIP.