wedding_update_hosting_variable_effect

wedding_update_hosting_variable_effect = {
	set_grand_wedding_betrothal_variables = {
		HOST = scope:new_host
		SPOUSE_1 = scope:spouse_1
		SPOUSE_2 = scope:spouse_2
		PROMISEE = scope:host.var:promised_grand_wedding_to
	}
	# copy bloody variable to keep it works.
	if = {
		limit = {
			scope:activity = {
				has_activity_option = { 
					category = special_type 
					option = wedding_type_bloody
				}
			}
		}
		scope:host = {
			if = {
				limit = { has_variable = bloody_wedding_backed_down_var }
				scope:new_host = {
					set_variable = {
						name = bloody_wedding_backed_down_var
						years = 1
					}
				}
			}
			else_if = {
				limit = { has_variable = bloody_murder_fail }
				scope:new_host = {
					set_variable = {
						name = bloody_murder_fail
						years = 1
					}
				}
			}
			if = {
				limit = { has_variable = bloody_wedding_murder }
				scope:new_host = {
					set_variable = {
						name = bloody_wedding_murder
						value = prev.var:bloody_wedding_murder
						years = 1
					}
				}
			}
		}
	}
}

As written in game/common/scripted_effects/04_dlc_ep2_wedding_effects.txt.