The jury is still out. After the Synod on the Family I honestly doubt there will be any further room for debate.
The woman was never divorced and hence has not remarried; this actually concerned her husband, who had had an earlier civil marriage.
I don’t know what the other circumstances were, that is, whether they were at some point married in the Church, or whether this is a situation of two people who are technically unmarried just living together, or what. They’ve “been together” for almost 20 years and have several children.
Very puzzling, but she is apparently not “divorced and remarried.”
The jury is out on this one also.