start_infidelity_confrontation_story_discovery_effect

start_infidelity_confrontation_story_discovery_effect = {
	if = {
		limit = {
			NOR = {
				$DISCOVERER$ = $LOVER_2$
				$DISCOVERER$ = $LOVER_1$
			}
			$DISCOVERER$ = {
				OR = {
					has_relation_lover = $LOVER_1$
					is_spouse_of = $LOVER_1$
					has_relation_lover = $LOVER_2$
					is_spouse_of = $LOVER_2$
				}
			}
			NOR = {
				$LOVER_1$ = {
					any_owned_story = {
						type = story_cycle_infidelty_confronter
						var:lover_2 = $LOVER_2$ #var:lover_2 is the secret target i.e. the other person
					}
				}
				$LOVER_2$ = {
					any_owned_story = {
						type = story_cycle_infidelty_confronter
						var:lover_2 = $LOVER_1$ #var:lover_2 is the secret target i.e. the other person
					}
				}
			}
			#Exempt marriages to polyamorous spouses.
			NOR = {
				$LOVER_1$ = {
					OR = {
						any_spouse = {
							count = all
							accepts_adultery_without_penalty_trigger = yes
						}
						has_character_flag = block_infidelity_flag
					}
				}
				$LOVER_2$ = {
					OR = {
						any_spouse = {
							count = all
							accepts_adultery_without_penalty_trigger = yes
						}
						has_character_flag = block_infidelity_flag
					}
				}
			}
		}
		infidelity_confrontation_story_creation_effect = { LOVER_1 = $LOVER_1$ LOVER_2 = $LOVER_2$ }
		scope:infidelity_story = {
			add_to_variable_list = {
				name = confronting_partners
				target = $DISCOVERER$
			}
		}
		#Certain changes to desc in event if the secret was revealed through investigation
		if = {
			limit = { $DISCOVERER$ = { is_ai = no } } #Text changes are only relevant to players

			#Save the secrets so we can check them
			$LOVER_1$ = {
				random_secret = {
					type = secret_lover
					limit = {
						secret_target = $LOVER_2$
					}
					add_to_temporary_list = secrets_for_desc
				}
			}
			$LOVER_2$ = {
				random_secret = {
					type = secret_lover
					limit = {
						secret_target = $LOVER_1$
					}
					add_to_temporary_list = secrets_for_desc
				}
			}

			#infidelity_confrontation_1000_investigation_desc
			if = {
				limit = {
					any_in_list = {
						list = secrets_for_desc
						exists = var:revealed_through_investigation_by_desc
						var:revealed_through_investigation_by_desc = $DISCOVERER$
					}
				}
				scope:infidelity_story = {
					set_variable = {
						name = infidelity_confrontation_1000_investigation_desc
						value = yes
					}
				}
			}

			#revealed_through_confession_to_desc
			if = {
				limit = {
					any_in_list = {
						list = secrets_for_desc
						exists = var:revealed_through_confession_to_desc
						var:revealed_through_confession_to_desc = $DISCOVERER$
					}
				}
				scope:infidelity_story = {
					set_variable = {
						name = infidelity_confrontation_1000_confession_desc
						value = yes
					}
				}
			}
		}
	}
}

As written in game/common/scripted_effects/00_secret_effects.txt.