You gave those guys the best gift anybody has ever given them. You’re such a good person for that, your karma is off the charts.
I’m sure you’ll have a healthy relationship with the kid in the future even if it’s not in a parental capacity. I really respect the hell out of you, you know!
I’m sorry it feels so hard and painful. You did a lovely thing for that couple. Gave them a beautiful gift, plus you get to share in your son’s life. You are a great person. I hope you don’t dwell on the pain, because you deserve happiness from this