It isn’t bad is it slut?”“No Mistress.” I responded as I licked all of the crop. I licked both sides to make her happy as I didn’t want my ...alls smacked again.“You will learn to like the taste. Just like all sluts like the taste of a man’s cum and how it feels in their mouth.”I wasn’t sure what she meant but she started to slide her fingernails up the underneath part of my cock. I was being to feel aroused again.“To experience being a slut, you have to learn what it is like to fuck and not. I just could not believe what I was watching. My sister was kissing my wife and my wife did not seem to have any objection to it. She too was responding very enthusiastically.My first reaction was to barge into the room and stop them before they could go any further. However, something from within stopped me; I did not know what it was, but I remained hidden behind the door and noiselessly watch the events in my bedroom.Nikki was still kissing Connie when I observed her hands moving over my. She ordered me with pure lust in her eyes as she stood up. I put my hand into her leggings and massaged her clitoris. “Aahhh” was the immediate reaction. Her pussy was completely wet by this time. I didn’t waste any time and pulled her leggings and panties off simultaneously.It was my turn now to return the pleasure. I knelt in front of her pussy and continued to tease her with my fingers, but didn’t lick her. She violently held my hair and pushed her pussy into my mouth.I continued to massage. Mean ohhh... Yes! I mean-" SNAP! Downward this time, catching my right nipple and the end of the breast. "Ooooonnooo... ohhh Th... Thank you S... Sir... M... More pleaseee..." SNAP! SNAP! SNAP! My left nipple exploded in throbbing pain. "Oohhh, fuckkkkk... nnggggggg... Ohh... ohhhhhh..." My whimpering trailed off and my hard breathing filled the room. I shifted my weight from foot to foot and my breasts ached hotly. My fingers were numb from clasping them together so tightly. I was.