Spanish non-liberal couples end up fucking exchanging

In principle, these non-liberal Spanish couples attend the shooting studio of a porn producer to fulfill their fantasy of recording a video. It gives them a lot of morbidity, but they have no intention of exchanging. The thing changes when they have been fucking for a while and the boyfriend of one of the aunts tells him that he wants to fuck the other, so since they already have a lot of vice everyone gives their approval and they get to fuck crossed. They continue this way until each one of them ends up running on the little foxes who love to feel the warm milk of someone who is not their partner.