I see where you are going with this and it almost works except for the this one thing- it would require for God to divorce us and it would require for salvation to be based on our own merit not ont eh blood of Christ
But Jesus said
John 6:37-40
All that the Father gives me will come to me, and whoever comes to me I will never cast out. For I have come down from heaven, not to do my own will but the will of him who sent me. And this is the will of him who sent me, that I should lose nothing of all that he has given me, but raise it up on the last day. For this is the will of my Father, that everyone who looks on the Son and believes in him should have eternal life, and I will raise him up on the last day.
He will never cast out... this doesn't sound like he would divorce us and as for us being unfaithful we are all unfaithul every day in some way or another we sin in one way or another and in his kingdom not even one sin is allowed which is why we are covered in his sons blood so that it is not by our own merit we enter the kingdom but by the blood of Christ.
We do not own the deed to our salvation that deed was paid for and bought by the blood of Christ we cannot lose what we do not own for i ti snot in our hands to lose to begin with it is in the fathers hands and we cannot snatch it from his hands or we are thieves