Winter sucks him off while Katie watches

Before he knew it, Mark was sitting at the edge of the bed after they reshuffled the furniture around so Katie could watch them at work. Now the laptop and desk was moved so the camera was directed at Mark and the back of the very top less Winter who kneeled in front of him.

In her mouth was Mark’s hard dick.

Slurping away, Winter bobbed her head down on his cock. Mark didn’t know what to look at, his lovely topless girlfriend going down on him or her topless older sister squeezing her big boobs together.

Winter’s mouth was nice and warm, her tongue felt amazing being pushed against the skin of his shaft.

“Ohh fuck me! You’re really working him, aren’t you,” Katie spoke from the laptop.

Winter didn’t respond, she just kept sucking her man off. Those beautiful eyes peeked up at Mark who was breathing heavily, she was making sure he was enjoying himself. Of course he was, he was in a very good place right now.

Mark placed both of his hands behind the back of her head, he twirled part of her light brown hair before sweeping it away from the front of her face. Her tongue worked like magic, the way it ran along the tip of his penis had Mark begging to release his own hot cum.

Sensing that Mark’s focus was beginning to be solely on his girlfriend and her incredible tongue that worked on his cock, Katie made a move to regain his attention. She got out of her seat and re-centred the camera so Mark could see her full body as she stood back a little bit from the laptop.

He could see her entire body now for the first time this evening. She had on black leggings and nothing else. It was one sexy look, she spun her body around slowly, sticking out her butt in different poses, squeezing her heavy breasts together. The way her dark hair sat back in the ponytail just made her look even sexier, all the while making him even hornier which seemed hard to do considering the girl that had her head planted in between his thighs.

Mark’s eyes kept going up and down as he realised what Katie was doing. The busty older sister slowly peeled down those black tights, revealing more and more skin. She stuck her ass out in the direction of the camera to really make her point.

Two round white ass cheeks is what Mark was now staring at. While her pants came off, so did the small black thong from underneath.

All the way it went, off her legs. Katie wasn’t done there, she stretched out her butt cheeks. Mark could see her tiny butthole and more importantly, that very delicious looking bare pussy.

Shoving a hand down the middle of her legs while keeping her ass out, Katie rubbed herself. She used her fingertips to tease her moist pussy.

The image was almost too hot to handle. It had been at least a minute that Mark watched Katie rubbing her own cunt. By then, Winter had the feeling she needed to step it up, knowing her big sister was winning the battle from a computer on the other side of the world.

Winter pulled her mouth off his cock with the sound of a ‘pop’.

“Want to play with my boobs?” she asked him, leaning back and squeezing her own tits roughly.

Mark nodded enthusiastically leading to Winter standing up in front of him. She pushed her chest forward and kept her shoulders back.

And then she shook.

Oh baby did she shake them.

Right in front of Mark’s face, Winter’s boobs bounced around like two melons going berserk. He couldn’t even see Katie on the laptop now, all he could see was two round bare boobs smacking against one another.

Winter leaned forward and those tits soon began to smack against his face. Mark couldn’t just sit there and let her control things, he was too horny for that. Instead, he grabbed her and pulled her closely as his mouth slobbered all over those fantastic breasts.

Finding her right nipple, Mark’s mouth worked as a vacuum, sucking it right into his mouth as his teeth lightly bit down.

“If you’re really a good girlfriend, you’d let him fuck those tits,” Katie then said, trying to stay in the action.

Wanting to stay one up on her sister, Winter did what she had to do to keep her man happy. She kneeled back down, this time placing his cock in the middle of her breasts.

Mark used his own hips to thrust himself in between them as well as she could. He watched as she spat down on her own tits multiple times. Winter was using it as lube to make it easier for that hard cock to slide up and down.

“Mmmm you’re such a boob guy, aren’t you?” Katie spoke.

Mark looked up to see the laptop had moved into yet another position. It was now focused on the bed that Katie laid on completely in the nude. In one hand was her left breast, the other hand plunged deep into the folds of her vagina.

It was like two sisters going back and fourth in their own way of friendly competition.

“Fuck those tits!! Fuck them!” Katie demanded from her screen.

In the middle of thrusting her own breasts up and down her boyfriend’s hard aching pole, Winter looked up at him to see if he was thinking what she was.

“You want to get your pants off?” Mark asked her, believing she was ready to let him fuck her pussy before he came.

“Mhmm. I want you to fuck me doggy style baby. Face me into the camera.”

Mark excitedly helped Winter up as she quickly removed the bottom half of her clothes. She couldn’t have got naked any quicker, licking her own fingers, she used them to wipe her pussy, making sure it was wet enough to be fucked from behind.