Does the questioner bear the sins of the young man and woman's conversations every time they speak to each other, based on the Hadith: "Whoever calls to misguidance will have the same sin as those who follow him"?

Whoever calls to a sin or misguidance bears the burden of all who follow him in it. If a servant sincerely repents to Allah with a sincere repentance (tawbah nasuhah), Allah accepts his repentance and forgives him, as Allah Almighty says: ﴿O YOU WHO HAVE BELIEVED, REPENT TO ALLAH WITH SINCERE REPENTANCE. PERHAPS YOUR LORD WILL REMOVE FROM YOU YOUR EVIL DEEDS AND ADMIT YOU INTO GARDENS BENEATH WHICH RIVERS FLOW﴾ [At-Tahrim:8]. By your sincere repentance, you will have fulfilled what was obligatory upon you, even if others continue to commit the evil deed.