He took the dildo out of me and replaced it with his cock. He began fucking me in earnest, pounding my asshole hard, thrusting into me balls deep. He ...ave me a great fucking, and then all too soon he pulled out and lay on his back. He wanted me to ride him. I took my panties off and mounted his cock, reverse cowgirl. I squeezed his cock with my ass as I rode him. I was his cock-slut and I wanted this to feel as good for him as it did for me. I rode his cock up all the way to the tip, and then. I was in serious denial mode. Complete disbelief.When I got home from school that night, I found her sleeping on the couch. It was 10:30 by this time so her dozing was normal. I could do nothing but stare and shake my head in denial. She was cheating on me. It was difficult to keep myself from confronting her. But I wanted irrefutable proof for later ammunition.Half grumbling, I warmed up dinner and ate in deep thought. Around midnight I woke her gently and told her to come to bed. I lay in bed. Now he was below her and she was the driving force, and drive she did. She moved on him with all the force and determination as he had ever used on any girl. He was beginning to pant as she bounced up and down on his shaft.Looking him straight in the face she said with a voice mimicking his and amidst her almost violent movements, "When I get done with you, you will know that you've been fucked!" Reaching behind her body as she moved, she grabbed the base of his cock and squeezed very firmly,. I tentitivly reached out and touched him, it was like an electric shock, his cock twiched in my hand, he moaned into my chest and I was pleasantly supprised at how nice it was to hold someone elses hard cock in your hand. It was amazingly hot to the touch and the texture on his skin felt lovely, I know this may sound corny but I got an immediate sense of empowerment, I gently started to stroke up and down the length of his dick and was rewarded by feeling it grow even firmer, I carefully.