BDSM Partner Swapping

Lara has arranged to meet her friend Didac at a bar. Didac has just been dumped by his girlfriend and is seeking revenge with other women. That's the plan for the night, but his indecision towards the women there begins to frustrate our protagonist. Just as she is about to give up, Lara runs into an old friend and her companion. After talking for a while, they decide to make the boys an offer: a swap! They, of course, accept. So they leave them alone, and the two women go off to have sex, something they have wanted to do for a long time.