馊主意，

It is totally against U.S. law to bring a child to the U.S. on a temporary visa of any sort, with the intent of keeping him/her here and having him/her adopted by someone. Technically, the parents of the child could be prosecuted for visa fraud, which is a felony in the U.S., and you could be prosecuted for assisting in this process.

adoption.com/forums/thread/396126/intercountry-adoption-of-a-relative-child-who-is-already-in-the-us-urgent/