house_feud_lover_exposure_effect

house_feud_lover_exposure_effect = {
	hidden_effect = {
		if = {
			limit = {
				has_bp1_dlc_trigger = yes
				is_married = yes
				any_spouse = {
					exists = house.house_head
					house.house_head ?= {
						valid_for_feud_events_with_target_trigger = { TARGET = scope:sex_partner }
						NOT = {
							accepts_adultery_without_penalty_trigger = yes
						}
					}
				}
			}
			# Save cheating spouse scope for reference
			save_scope_as = house_feud_spouse
			# Save cuckolder's scopes for reference
			scope:sex_partner = { house_feud_save_head_and_attacker_effect = yes }
			every_spouse = {
				limit = {
					house.house_head ?= {
						valid_for_feud_events_with_target_trigger = { TARGET = scope:sex_partner }
					}
				}
				# Save cuckolded spouse for reference
				save_scope_as = house_feud_victim
				house.house_head = {
					# Chance for House Head to have option to start Feud
					random = {
						chance = 75
						modifier = {
							add = 25
							has_trait = vengeful
						}
						modifier = {
							add = -25
							has_trait = forgiving
						}
						modifier = {
							add = -25
							has_any_bad_relationship_with_character_trigger = { CHARACTER = scope:sex_partner }
						}
						# House Head version
						if = {
							limit = { is_spouse_of = scope:house_feud_spouse }
							trigger_event = {
								id = bp1_house_feud.0013
								days = { 5 15 }
							}
						}
						# Close family version
						else = {
							trigger_event = {
								id = bp1_house_feud.0014
								days = { 5 15 }
							}
						}
					}
				}
			}
		}
		# Score and message effects
		if = {
			limit = {
				exists = scope:sex_partner.house.house_head
				any_spouse = {
					save_temporary_scope_as = house_feud_cuckolded_temp_1
					scope:sex_partner = {
						house_has_feud_relation_with_trigger = { TARGET = scope:house_feud_cuckolded_temp_1 }
					}
					save_temporary_scope_as = house_feud_cuckolded_temp_2
				}
			}
			scope:house_feud_cuckolded_temp_2 = { save_scope_as = house_feud_cuckolded }
			scope:sex_partner.house = {
				change_house_relation_feud_score_effect = {
					TARGET = scope:house_feud_cuckolded.house
					REASON = cuckolded
					VALUE = house_feud_minor_counter_value
				}
				# If original Feud reason was cuckolding, fire revenge event for House Head
				if = {
					limit = {
						any_house_relation = {
							has_house_relation_level = feud
							any_relation_house = {
								NOT = { this = scope:sex_partner.house }
								this = scope:house_feud_cuckolded.house
							}
							OR = {
								var:house_feud_reason ?= flag:head_cuckolded
								var:house_feud_reason ?= flag:family_cuckolded
							}
							var:house_feud_attacker ?= scope:house_feud_cuckolded
							NOT = { exists = var:feud_avenged }
						}
					}
					house_head = {
						trigger_event = { id = bp1_house_feud.7003 days = 15 }
					}
				}
			}
		}
	}
}

As written in game/common/scripted_effects/03_bp1_scripted_effects.txt.