Molly rubbed the spit onto her sex. It made it look wetter and allowed her fingers to more easily explore but it wasn't the same thing as the arousal of her own juices. Molly was trying but she had no stimulus, at least no stimulus she found sexy, to work with. So she kept rubbing and stroking and prodding even as she kept sucking his deck. An hour passed. Then another and another. Molly started getting tired. Her wet mouth sucked exhaustedly on the dick that just wouldn't burst even as she kept poking her sex. She slumped forward a little on her knees and shifted her position a little to get more comfortable. She hoped that he would just cum anyway. After all, he had been sexually involved in what was going on for hours and there was nothing sexual in this for her at all. She kept trying to stimulate a resolutely uninterested cunt and kept sucking his dick until he either came or ended it. She just couldn't cum in this situation and time would make no difference.