I don't think the father should be forgiven easily with just this he's been out of his life for years and before this had no intention of every seeing him again.
Free my boy Gen he ain't killed no one (just seriously attempted to). Seeing the mom in the hospital bed in critical reminds me of the grandma, taking care of his mom could be another anchor to the town and his life.
Nora is right, in this timeline they never showed an ounce of love to her. Yeah they were planning it for the wedding but wtf they were so selfish including Jeremy who was a full adult for almost as long as Shuli who is only like 2 years older.