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.
Leaving such a lovely wife alone, and moreover at my sister's wedding with many guests, is reckless. The sense of celebration, alcohol, and temptation would do the trick. The negro noticed the bored girl and was rewarded for his attention and concern for the beautiful stranger. She thanked him like the female the male had chosen for the day. Now her body will remember this unforgettable encounter.
Young girls sucking to please guys and keep them around. Nipples are successful and attract males. Everyone wants not only to fuck her pussy, but to give her in the mouth and cum after that. It's a pleasant sight - the partner's lips smeared with cum, the drops dripping from the end on her tongue, her breasts smelling of sex. For a man, this picture is the height of bliss. With that, the girl is down, expressing submission and acknowledging his power over her.