When you speak to the target NPCs during the quest, if you flirt correctly, a large heart appears over their head, swelling and growing. If your game is weak, the heart that appears above their head snaps in two and disappears.
This article refers to events, personae, items and activities only present in-game during the annual Erollisi Day festivities, which come to Norrath each year for a short time roughly around February 14th.