score:1
All people on Earth are spiritual sons and daughters of God, who is called Heavenly Father for this reason. So, all those on this Earth who "attain godhood" will be reunited with Him in one giant happy eternal family. This includes a couple and their earthly children.
At this point, it becomes more speculation on my part. There may be references for what I am about to say, but I couldn't tell you them.
As I understand it, any spiritual children that a celestial couple has will go through the whole plan of salvation that we are currently going through on another "world". As they attain godhood, they will be added into the big happy eternal family that will include their earthly parents, their spiritual parents, and our Heavenly Father and Mother. As far as whether they will have "equal status" I would say yes in the sense that all people are equal in God's eye, but I would say no in the sense that the earthly children would have much much more time to progress, and therefore will be at a higher level similar to how God is at a higher level than us.