What do you need to incapacitate your son? A court order? You mentioned something like that. If this seems to be the only sensible solution for you, you should go this way. You still couldn't stop him from impregnating a girl, but he probably wouldn't be responsible as a father, neither emotionally nor financially? Do I see it correctly that you are afraid that from now on you would not only have your son, but also additional responsibility for a grandchild and possibly a woman at your son's side, whom you did not ask for?

Would incapacitation mean at the same time that a diagnosis of mental disability must take place, that your son would have to live under supervision in an institution for the disabled? Where would he be looked after 24/7 and you would be freed from this difficult task? After all, an adult man cannot be guarded and patronized unless others confirm that he does not have the ability to take care of himself.

In the meantime, it seems, you have to live with this torn heart, which deeply desires freedom and on the other hand cannot simply let go of the burden of responsibility.

But as long as your son is considered legally capable and liable, he must stand or fail for his actions, whatever that means.

Can you take advice and help in your immediate surroundings? There will be people who offer that, won't there? It seems to me that you deal too much with yourself.