Is it true that a man who commits adultery with a married woman will be demanded on the Day of Resurrection by her husband to give him all his good deeds in exchange for his sins, even if he repents?

You have committed a grave sin by engaging in adultery (zina), which is an abomination forbidden by Allah. Its sin is even greater if the woman involved is married, due to the violation of her husband's sanctity. What you mentioned about meeting the woman's husband in Paradise in the manner described, we have not come across it. However, there are texts that indicate recompense (muqassah) on the Day of Resurrection. You must increase your repentance (tawbah), seeking forgiveness (istighfar), and performing righteous deeds as expiation for what you have committed. Also, increase your good deeds in preparation for the reckoning with those whose rights you have violated, for Allah forgives His own rights through repentance, but He may not forgive the rights of His servants.