Yes, Imelda complains about her husband and says she’ll never forgive him, but look:
This is the face she makes when he says “This is my fault; I’m sorry”.
I think an apology is all she ever wanted from him, for all those lonely, tired years of hard work. She just didn’t realize that this was what she needed until he said it.
also she’s quite stubborn so she has to give herself time to figure it out