reveal_to_without_events_effect

reveal_to_without_events_effect = {
	if = {
		limit = { secret_type = secret_disputed_heritage }
		$CHARACTER$ = {
			add_character_flag = {
				flag = block_secret_disputed_heritage_discovery_event
				days = 20
			}
		}
	}
	else_if = {
		limit = { secret_type = secret_unmarried_illegitimate_child }
		$CHARACTER$ = {
			add_character_flag = {
				flag = block_secret_unmarried_illegitimate_child_discovery_event
				days = 20
			}
		}
	}
	else_if = {
		limit = { secret_type = secret_murder_attempt }
		$CHARACTER$ = {
			add_character_flag = {
				flag = block_secret_murder_attempt_discovery_event
				days = 20
			}
		}
	}
	else_if = {
		limit = { secret_type = secret_murder }
		$CHARACTER$ = {
			add_character_flag = {
				flag = block_secret_murder_discovery_event
				days = 20
			}
		}
	}
	else_if = {
		limit = { secret_type = secret_lover }
		#Cannot block because the event is mechanical.
		#You can reveal a lover secret and add a variable to it to get special texts. Check out the story_cycle_infidelty_confronter
	}
	reveal_to = $CHARACTER$
}

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