She waits silently for what's next.
On her lover's command her husband had tied her wrists to the chandelier - leaving her with her feet just touching the carpet. Then he sits and watches as her lover, John, comes up behind her, slowly removes her dress, kisses her neck, ear lobes, unclips her bra, and squeezes her breasts with his strong hands. He rolls her nipples in his fingers and squeezes just to the point of pain. They are so hard - sensitive, pulsing.
She feels his cock on her ass, a hot rod of engorged blood and muscle. The soft glans graze against her lower back as his hands take the front of her bikini panties and pulls them together in a tight strand. Then he pulls them up into her slit, now overflowing with juices. As he bites her neck he pulls her panties up against her clit, hard. She feels his teeth on her skin, then his tongue and lips kissing the mark.
She feels him lower the panties and softly pull the soft hairs of her pussy. When she opens her eyes she sees her husband, small cock erect come up to her. He's so inadequate, she thinks. It's like a child's penis.
She feels John behind her. With one hand, he parts her cheeks whilst the other presses something cold and viscous against her puckered rosebud. A single finger slips inside her, smearing the viscosity around the inner rings of muscle. She knows what is coming, but before she can prepare herself for the invasion, she feels his glans against her, feels it pressing insistently against the forbidden opening. Her mouth turns down in a grimace as his hard flesh impels its way inside her. Suddenly, he is past the rings of muscle, his glans and half his shaft buried within the taboo place. There is burning and some pain, but then there always is. It's part of the pleasure. There is a tang of violation about the way that he's chosen to take her ass first, but before she can reconcile herself to the fact that the tang excites her as much as it shames, she senses her husband before her and immediately feels his small cockhead against her clitoris. He excites her still-throbbing flesh with his own as John behind begins to fuck her in earnest. The sensations blend together somewhere deep inside her, and she groans with decadent pleasure once more. She senses an orgasm rushing towards her through the self-imposed darkness, and just as her climax reaches her, her husband standing before her slips his glans downwards and thrusts himself inside her cunt to the hilt.