Yes it will, adoption and marriage are not the same thing as say a state permitting the purchase of alcohol within their boundarys. They also can't just prohibit their entry. When Bush said he would support an ammendment I believe he had this in mind. Of course the judicial could rule that this is not a case for full faith and credit, and congress has already passed a law allowing the states to do this kind of legislation. But we will see.
If the Oklahoma judge subscribes to the ABA model family law divorce code, he/she will hold that children are not a LEGAL part of marriage. Children are only an accessory to breeding pairs. (aka the homosexual slur of "breeders")
This case is VERY dependent on who is the judge and if the judge ever worked in the real world rather than just a government job.