Girlfriend is a voyeur

An old girlfriend tells me about her innocent seeming flatmate who is a slut

I dated Emma for around a year. She got a job after university and moved away. It didn't end badly, we just moved on, we kept in touch for a while but she it dwindled away.

We were on our 3rd or 4th date I think. It certainly wasn't that many, we hadn't had sex yet but we had talked dirty and had mutually masturbated and I had fingered her to orgasm and she had gave me a hand job a couple of times. Her flat mate was out that night and we had been out for dinner. After dinner we took a pill of MDMA each, I did.it now and again but his was her first time On the way back on the subway I told her she looked hot as fuck. She was skinny, small tits, blonde bobbed hair, very cute. She whispered in my ear that she had no panties on.
She as wearing a knee length skirt so without asking I put my hand under and put my finger in her.

The MDMA was hitting hard now but we managed to keep ourselves together as the subway was quite busy.
I murmured to her that I wanted to know the dirtiest thing she had done, she hesitated a minute and then said she loves to masturbate to a porn video where three guys wank over a girl sitting on a chair. The girl in the video is dressed in a schoolgirl uniform and fingering herself while they just cum over her face and tits. She stroked my cock through my trousers as she said the last bit.

She was looking flustered and she said lightly "i'm so wet thinking about it"
"I'm gonna fuck you while we watch" it i tell her.
"Fuck yes" she said. "But.... " Her voice trailed off. She bit her lip and looked at me "The video is of my flat mate, she doesn't know I copied it from her hidden usb stick"

She suddenly looked sheepish, a bit worried I would think she was strange.
"You naughty girl, I can't wait I see it as I use you like a little slut"

We sat in silence for the rest of the journey, I wanted to touch her so much but thought I wouldn't be able to stop. It was a short walk to her flat and when we got off I asked her how she came across the video.
"Well Carol comes across as really shy and she is I suppose, one night we shared a bottle of wine and she said she had some grass in her drawer, we went through to her room and as she was looking through her drawer she opened up a small lock box with a key round her neck, in it was her passport and some paperwork, the small.bit of grass and a usb stick"
"Well I thought I wonder what's on that, I never thought, well you know it would be her"

So a few weeks later my girlfriend the little devil found the key in her flatmate room as she was showering.

Part two soon