expose_lover_secret_or_run_consequence_effect

expose_lover_secret_or_run_consequence_effect = {
	# TARGET = lover to be checked
	# EXPOSER = secret_exposer in case of a Secret reveal

	# Look for a Lover Secret and save it if one exists
	if = {
		limit = {
			$TARGET$ = { is_alive = yes} # Check whether the other party is still alive
			any_secret = {
				type = secret_lover
				secret_target = $TARGET$
			}
		}
		random_secret = {
			type = secret_lover
			limit = {
				secret_target = $TARGET$
			}
			save_scope_as = lover_secret_to_expose
		}
	}

	# Expose the Secret if it exists
	if = {
		limit = {
			exists = scope:lover_secret_to_expose
		}
		scope:lover_secret_to_expose = {
			expose_secret = $EXPOSER$
		}
	}

	# Otherwise run the expose effects
	else = {
		if = {
			limit = {
				is_spouse_of = $EXPOSER$
			}
			extramarital_sex_exposure_consequences_with_target_effect = {
				TARGET = $TARGET$
				SPOUSE_EVENT = no
			}
		}
		else = {
			extramarital_sex_exposure_consequences_with_target_effect = {
				TARGET = $TARGET$
				SPOUSE_EVENT = yes
			}
		}
		save_scope_as = this_character
		if = {
			limit = { $TARGET$ = { is_alive = yes } } # Check whether the other party is still alive
			$TARGET$ = {
				extramarital_sex_exposure_consequences_with_target_effect = {
					TARGET = scope:this_character
					SPOUSE_EVENT = yes
				}
			}
		}
	}
}

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