Well, gossip is not okay, but I'm happy to know how my friends' or family's lives are going.
I will show you a useful thing for when someone's telling you a story. You can use cuál to ask for identification of something or someone in a known group.
That sounds like really complicated to me!
Don't worry. Let me show you some examples. Imagine a conversation in a supermarket aisle:
¿Cuál es tu chocolate preferido?
Which is your favorite chocolate?
¿Cuál de estas aceitunas quieres, las negras o las verdes?
Which one of these olives do you want, the black or the green ones?