possibly_interested_in_character_trigger

possibly_interested_in_character_trigger = {
	OR = {
		has_relation_crush = $CHARACTER$
		has_relation_lover = $CHARACTER$
		has_relation_potential_lover = $CHARACTER$
		#Is not related to $CHARACTER$, or has an indicator that they would be interested anyways
		trigger_if = {
			limit = {
				OR = {
					any_sibling = {
						this = $CHARACTER$
					}
					any_parent = {
						this = $CHARACTER$
					}
					any_child = {
						this = $CHARACTER$
					}
				}
				NAND = {
					$CHARACTER$ = {
						is_ai = no
						has_perk = subtle_desire_perk
					}
					age >= 20
				}
			}
			always = no
		}
		trigger_else = {
			matching_gender_and_sexuality_with_trigger = { CHARACTER = $CHARACTER$ }
		}
	}
}

As written in game/common/scripted_triggers/00_romance_and_seduction_triggers.txt.