Hi, this answer is a bit confusing... I have a filipina wife K1 with K2 to follow minor step-daughter (10yrs old today) that I did not adopt but for all intents and purposes I'm her father. She still has her old last name, but my wife has my last name. They are both LPR 10yr green cards. Both Been here for 5 years. We are one happy family (we also have a U.S. Citizen & passport holder son 3yrs old). So we are ready to file for citizenship n-400 (i've been procrastinating)... So when my wife becomes a citizen, her daughter automatically becomes one? what does that mean? Just fill out one form? Is there two fee's? Do we submit pictures for both? please explain more detail. thanks.