Manhattan made me think of two things.
First, the father did agree to become a father when he donated his sperm BUT let’s use this analogy. Let’s say you drive to the store. On that drive you get in a crash and lose your leg. You wanted to drive, you wanted to get to your destination. HOWEVER, had you known you were going to crash and lose your leg you wouldn’t go, right?
Now let’s apply this to the case. The man didn’t know his marriage would crash. Now he does. He now has more information. Thus having this benefit allows him to reconsider. It would be akin to taking a $40,000 a year job then on your first day them telling you “Oh by the way our work week is 80 hours, not 40 hours.” Well then your salary isn’t really $40,000. You have more information so the situation changes.
Had the father known his marriage would crash he most likely wouldn’t have donated his sperm. Which brings to mind the idea that more couples should consider this beforehand
The second thing that came to mind was couldn’t the man claim 1/2 the embryos and have them planted into another woman. When these babies are born, then the woman would have to support them. (if that was possible)?