Complex sentence: It is considered rude when children are staying in a room where adults, or elders want to have a conversation, and so winking is more discreet than telling the children to leave the room.
Split into simpler sentences: It is considered rude when children are staying in a room where adults, or elders want to have a conversation. The wink is thought to be much more decent and discreet than telling the children to leave the room.