Part 2.
"You son of a bitch," he yelled.
"You're fucking my girlfriend!" he yelled again and switched on the light.
Erica jumped up and screamed. I raised my hand and told him to calm down, but he had none of it.
"You can't stop, can you? You need to fuck everything in sight!" Ian kept screaming.
Despite his protest his cock was rock hard and although he was screaming down at me, couldn't help but look at his manhood standing proud.
Erica pulled the sheets over her but didn't really cover her sweaty breasts.
"Ian... sit down," she said and patted a free space next to her on the bed.
"I have to confess something," she continued... "I knew it was your father the minute I felt him inside me...and to be honest I kinda liked it."
Both of us were starring at her and I could feel a smirk shaping on my lips but immediately got serious when I saw my son's piercing eyes looking at me.
"Ian, look at you. Your cock is hard, its dripping.... you obviously enjoyed seeing me and Erica going at it. You sure you don't want to join?" I sheepishly asked hoping he would say yes.
"You got to be kidding me! You are unbearable!" he yelled again.
"Perhaps he's right." Erica said and smiled at him extending her arm towards him.
"Are you serious?" Ian asked.
"Yes, why not? Your dad told me you've done this before...," she said and immediately Ian turned towards me again his face like thunder.
Erica approached me at the edge of the bed and put her one arm around me and with the other she started rubbing my chest. Her hand went down to my hard dick, grabbed it and squeezed its head. A few drops of precum popped out, which she wiped with her finger and brought it to her mouth.
"Please Ian? What happened, happened. Let's enjoy ourselves, huh?" she said and winked at him.
She kept massaging my dick, which was now so fucking hard it was pointing upwards. I kept looking either down at her hand wanking me off, or my son and her.
All this time Ian was standing in front of me, his dick did not go soft even for a moment. My breathing was becoming quite heavy as Erica was massaging my cock. I laid back in bed, my feet on the floor and put my hands behind my head letting her do all the work.