Two Russian swinger couples share a couch

The two couples talk and agree to make a trade. The boy takes the girl to the sofa and starts kissing her softly. The other couple shares the sofa and they also kiss. One of the girls gives him a blow job and feels his dick growing inside her mouth while the other girl pulls down the boy's pants and does the same. Both girls suck the cocks and get fucked watching the other couple do the same, until the boys cover them with semen