Masturbation.

Your cock swells in pleasure at the touch of Katherine as you say, “Click on masturbation. I like to watch girls getting themselves off.”

“Oh you do," Katherine says tilting her head at you in a teasing manner. “Well let’s see what they have for us here.” She reads quickly down the list and makes a selection. The screen lights up with a big titted blond using a vibrator on her clit. Her pink nipples are erect, and she is using one hand to rub and twist them as she holds the vibrator against her clit. You can see that the woman’s cunt is all wet and juicy, and her pussy lips are engorged and swollen from her lust.

Katherine says to you, “Jerk off for me. I want to see your cock in action.”

You unzip and free your hard boner and start to rub up and down its length. Katherine goes down on her knees in front of you and watches as you slowly fist your cock. The woman on the screen brings herself to orgasm, her hips buck and she screams loudly in pleasure as she presses the vibrator against her climaxing clit. You like the way her nipples crinkle when she climaxes, and you think about spraying your load across her tits. That has always been a fantasy of yours, cumming on a woman’s tits. The thought of your cum dripping from her stiff pink nipples makes your cock harder than hard.

Katherine is getting turned on too. She stands up suddenly and fiddles beneath her dress and you realize she is pulling down her panties. Then she moves back against you as she says, “put your cock in me. Let’s fuck while we watch the movie, oh and I like to talk dirty I hope you don’t mind.”

She grasps your hard cock and rubs it against her cunt, she is soaking wet and you slide inside her tight fuck hole with no problem as she sits down on your lap. You can feel her clasping at your cock and you jerk your hips forward and back, slowly fucking her as the movie plays. The scene has moved to a man masturbating over a woman who is also fingering herself. The man’s cock is enormous, and the sight of it gets Katherine talking, “Yeah fuck me with your big cock, shove it in me, baby, fuck me with that big cock.”

You are more than happy to oblige even though your cock is nothing more than average, but it seems to be doing the job on Katherine. You move your hands up and cup her tits, sliding one hand down the front of her dress and finding her erect nipples. You pinch her hard nipple between your fingers and she is moaning in pleasure as she rocks on your hard cock buried to the balls in her pussy.