In Aubout du Monde, as elsewhere, it is held that twins are psychically connected - that their thoughts and feelings are shared, as though one person split in two.
When they offer themselves together, they offer themselves as a single woman; they lust, fuck and cum as one.
Amongst the Cetra, the guest right is a sacred law of hospitality. When a guest, be he common born or noble, eats the food and drinks the drink off a host’s table beneath the host’s roof, the guest right is invoked. When invoked, if either the host or the guest initiates sexual contact, the other party must reciprocate.
Eat her food, fuck her pussy.