lover_breakup_effect

lover_breakup_effect = {
	$BREAKER$ = {
		save_scope_as = breaker
	}
	$LOVER$ = {
		save_scope_as = lover
	}

	show_as_tooltip = {
		$BREAKER$ = {
			remove_lover_or_soulmate_relation_effect = { CHARACTER = $LOVER$ }
		}
		$LOVER$ = {
			add_opinion = {
				target = $BREAKER$
				modifier = lover_breakup_opinion
			}
		}
	}

	hidden_effect = {
		$LOVER$ = {
			if = {
				limit = {
					is_consort_of = $BREAKER$
				}
				trigger_event = lover.0202 #Spouse breakup
			}
			else_if = {
				limit = {
					opinion = {
						target = $BREAKER$
						value > 0
					}
				}
				trigger_event = lover.0201 #Normal
			}
			else = {
				trigger_event = lover.0203 #Relieved
			}
		}
	}
}

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