She lay on the bed, naked, alone with her thoughts. Earlier that evening her husband had greeted her at the door with a kiss and had whispered something in her ear about it being a "special" night. He'd accompanied her to the bathroom where he'd helped her out of her clothing and drawn a nice warm, relaxing bath for her. After gently scrubbing her he'd then left her to soak with the instruction to call him when she was ready get out of the tub. There hadn't been anything unusual about this scenario; they often bathed each other as a prelude to enjoying an evening of sex.
When they'd married, she'd initially been a bit reserved in their lovemaking but he'd applied himself to the task of awakening her libido until, after nearly thirty years of marriage, she gave as good as she received in the bedroom. She was secretly pleased that, unlike so many of her friends, she and her husband still had an active and imaginative sex life.
Finished with her bath, she called him back and he dried her off with a warm towel while explaining that tonight he wanted to try something a bit different. Placing a blindfold on her, he led her naked from the bath to their bedroom and bid her lie down on the bed. Once lying there, he had taken each wrist and ankle in turn and applied a soft restraint, pulling her limbs gently taut and fastening them to the corners of their king-size bed.
He explained that he'd blindfolded her in order to free her imagination and that the restraints were to heighten her anticipation of what was about to happen. Tying her would make it possible for her to only receive his tender caresses and not return his advances. Kissing her softly he drew a coarse woolen blanket over her naked form and withdrew from the room.
After the bath, the warmth of the room and the blanket enveloped her body and allowed her mind to drift to the countless times they had enjoyed sex together. Both the long, slow lovemaking as well as those times when, as if on cue, an unknown force had bidden them to tear at each others clothing and wordlessly join in a frenzied spiral to a volatile climax. Lying there with only her thoughts and her remaining senses, she relaxed and listened to the quiet sounds of her own slow breathing. She became aware of the scratchy texture of the blanket on her nipples, belly and thighs as her breasts slowly rose and fell beneath the wool as she inhaled and exhaled.
Her thoughts were soon interrupted as her lover silently returned to her bedside. She felt the lower half of the blanket peeled back exposing her legs from mid-thigh down. Grasping each ankle, he applied something to each inner calf just above the bonds that were holding her stretched and open on the bed.
He broke his silence; explaining that he had applied an adhesive electrode above each ankle and that he would connect these to a small, battery operated device which, when turned on, would send pulses of current up one leg, through her vulva and back to the other leg. He turned on the switch and ramped up the current until she told him that she could feel it. Replacing the blanket, he again kissed her and told her that he wanted her lie there a bit more to observe what was happening to her body.
Hearing him again leave the room she thought she must be mad for going along with this. She loved and trusted her husband, but at this moment she felt very vulnerable. As she slowly relaxed she became aware of the regular pulses of electricity running up her leg to her pussy. She soon realized that they perfectly matched her slightly elevated heartbeat and, before long, she noticed that her vaginal muscles had begun to contract in sympathy with each electrical pulse. At the same time she felt her outer labia swelling and parting in response to the rhythm coursing through her while her pussy moistened with excitement.