Thanks for the release. I can't decide if it's a happy ending or not...

I knew what the twist would be from reading the first part but this ending is too confusing...but thinking on it as I'm typing this, I feel they'll stay as family. There are different types of love and since the father is still married to the mother I don't see him carrying on an affair with his own son. Then again I could be wrong! I'd say a bittersweet ending.