He has already started retracting. He will continue to drink all the poison until one day he starts spitting venom. That day he will be again blamed for hurting mother daughter.
One thing that hit me hard in today's episode was while writing diary Minnie mentioned about venom and how every relation will be at stake but never thought of HS drinking all the poison . This alone shows the relationship between her and HS is not what he/ us think. Blood relations are always stronger than dil ka rishta.
Minnie and HS will get stronger after this but with lots of ups and downs along the way. They barely know each other a few months. I will cut them some slack.