He paid zakaat al-fitr on behalf of the foetus then found out that it was twins

My wife was pregnant during Ramadaan and I paid zakaat al-fitr on behalf of the foetus that was in his mother’s womb, but when the mother gave birth a few days after Eid al-Fitr, she gave birth to two twins by the will and decree of Allaah.

Do I have to do anything now, knowing that I gave zakaah on behalf of one foetus and I did not give anything on behalf of the other?.

Praise be to Allah, and blessings and peace be upon the Messenger of Allah:

You do not have to do anything because of not paying zakaat al-fitr on behalf of the second foetus.

And Allaah is the Source of strength.