Check it now.

Your kind of wondering what happened to Katherine after she disappeared for the rest of the day following what you two got up in the girl’s bathroom. Perhaps she might have some sort of explanation.

You click on the message pop up and the chat screen with Katherine enlarges onto the screen. Your chat history is there and up until this point in your life, it's only been a couple of random messages here and there asking each other about homework for Accounting class. Not exactly interesting stuff.

You see the latest message is something different though.

‘Hey. Just wanted to say sorry I baled on you guys for the rest of school.’

‘Don’t worry about it, Kat. I didn’t do anything wrong did I?’

She takes a while to respond, her typing message sign appearing and disappearing a couple of time before her next message pops up.

‘No. It was me. You were good. Great even. I just didn’t think I could be around you and Becca after we did that.’

‘I’m sorry I put you through this. You were amazing too.’

‘Thanks xx soooo you liked it?’

‘Are you kidding!!! It was incredible.’

‘Hehe me too… but we should never do that again in person. It’s wrong’

‘Whatever you say. I don’t want to make you feel uncomfortable.’

‘You don’t! You make me feel so turned on. That’s twice now’

You can’t help but grin like an idiot when you read that you have made Katherine horny twice already. Today and when she was watching you and Rebecca make out on the bed.

‘Go me!’

‘Make that 3 times actually’

‘When was the third time?’ you type not knowing to when she’s referring to.

A video call request then pops up on the screen from Katherine. You click accept hoping she’ll shed some light on things. The video starts to play of Katherine sitting in her room in a short cropped t-shirt. Her room you’ve never seen before but is even more girly than you would have expected with a heap of stuffed toys and pillows on her bed behind her and a poster of a unicorn and a rainbow on the wall.

Katherine smile when she sees you, waving at the webcam.

“Hey,” she says in a nervous greeting.

“Hey. Nice room,” you return.

“Shut up!” Katherine laughs.

“Hey, so three times?” you ask.

Instead of answering Katherine asks you a question back.

“So we can't ever do anything in person right?”

“Um ok yeah.”

“And this isn’t in person is it?”

“No.”

Katherine takes your answer and then quickly pulls her little cropped t-shirt off. You eyes pop out of your head as you see Katherine’s beautiful little tits on the screen of your computer. Her breasts would have to be around the same size as Rebecca’s but the skin of her nipples is much darker.

“Wow! Holy shit!” you say back in amazement. Just off camera, the erection your sister gave you in the bathroom is threatening to rip your pants.

“This is number three,” she tells you as she feels up her breasts, pinching the nipples for you on the screen.

You take it all in.

“Wait a second,” Katherine says as she reaches out to the webcam and adjusts it down so you can see her waist and legs as well. She's wearing just a pair of plain white panties after she removed her top before. She leans back on the bed with her legs out to the side as she starts to slide a hand inside the waistband rubbing herself between her legs. “Going to join me?”

You react fast, pulling your shirt off over your head and then sliding down your boxers. Adjusting your camera also Katherine is treated to the sight of your teenage cock standing straight up and proud in your laps.

“We can do anything we want just not in person,” Katherine repeats her mantra as she begins to finger herself inside her panties.

You quickly join her in masturbating by stroking your hard cock on the camera for her. Katherine’s gaze is locked on your hand stroking up and down on your shaft for you. You are already very turned on from rubbing up against your sister earlier so that it is only a few quick minutes before you realise you're going to come soon.

“Oh fuck I’m going to cum,” you tell Katherine about your imminent arrival.

Katherine eagerly turns around onto her hands and knees, peeling her panties down to her knees as she fingers herself between her legs back at you. This site pushes you over the edge and you start to splash cum all over your stomach and chest. You hadn’t thought about where you would need to cum when you first started.

“Hehe so fast,” Katherine giggles as she turns back to the camera and leans in close. Zooming in on just her tits and upper half of her body. You don’t let her know that you were practically halfway there already.

“Yeah, I couldn’t help it.”

“Ok well, I'll see you in at school tomorrow.”

Katherine then blows you a kiss and hangs up on the video call. You clean yourself up with your shirt, switching your computer off at last and then climb into bed. Ready for a good sleep before your last day of school for the week.