She came to the Catholic Church asking for absolution. What God will do I don't know, but if she asks the Church something she should be satisfied with the rules that exist in the Church.
She's legally married, she is not in a state of sin
One does not follow from the other. She is both legally married and in the state of sin.
show us where in the CCC it says that. Then why annulments?
See Canon 2383 and around it. Also read the scripture you already quoted.
Annulment is not divorce. Annulment is the recognition that an apparent marriage is not really marriage in the eye of God. If a marriage had been initiated properly, the spouses may divorce if a grave reason exists, but they will not obtain annulment.
I said.....And you claim divorce is not a sin? Pray tell, show us where in the CCC it says that. Then why annulments?
Show us where the CCC tells us that divorce is not a sin.