Watching your wife suck other people's dicks is a buzz kill. And she understands that by licking other people's testicles, her husband's boner will get sharper. So these swinger couples swap to sharpen their senses, bring back the novelty, and make their orgasms brighter. Only I would make the lighting not so bright, then there would be more understatement and less embarrassment.
The lady is just a great body and very flexible, and she's an ace in the anal! Clearly visible is the coverage of the cock entering the anus, the man clearly takes great pleasure. To extend the pleasure longer, he alternates between anal and sucking, so you can last much longer. But not all ladies agree to it, the majority take in the mouth after anal only if anal took place in a condom.
Yulia, give me your number