I'm gonna fuck you so hard. My cock is gonna tear this fuckin' pussy up."I moaned at her words and nodded, but as I went to speak her mouth moved down...to my pussy, and she flicked her tongue across my hard clit. My body jumped and I forgot what I was going to say, as she took my clit between her teeth and flicked her tongue across it hard.She didn't let me come; she moved right before I could. Her tongue moved down and she slowly inserted all she could of it into my hole. I gasped as she began. The effect was to send a blast of agony deep into my guts and simultaneously produce a line of fire through each of the previous cuts that brought fresh torture to my already tormented behind. She shifted position and landed another blow across the last, cutting an X shape into my rear with my anus exactly at the centre of the cross. I couldn't scream, I was beyond that. She left me slumped there whilst she returned the tawse carefully to the desk. Then I felt her presence beside me again,. Mom was already wet from her previous exercise and my dick slid into her to the hilt. Mom sat on me stunned at the fact that her son was inside of her pulsing pussy. At the urging and prodding of the gang, she reluctantly raised and lowered herself on my rampant cock, as dad looked on with another massive erection growing. Someone removed the gag from my mouth and commanded that I suck one of her extended nipples, as she increased her speed on my unyielding cock. After a relatively short time,. "No, no, a size smaller, please" I interupted. "She's wearing them for showing off." Again a smile played on the assistants face, and she turned to her shelves and various boxes.I toyed with the idea of making mother put them on in the shop, but by now I was eager to get back to the house so after selecting the ones we wanted (I wanted) we returned home.Mother stood in our hallway and looked at me: she was obviously dreading the next bit. "Upstairs, please, mother. Put on the red ones, a black.