Myself and my girlfriend went to this party at this person's house who she knows

It was while at the party. My girlfriend fell asleep on the sofa downstairs and I couldn't wake her up so.I left her down on the sofa.

We had been drinking probably too much.
My girlfriend had fallen asleep on the sofa and I couldn't wake her up.
She's lying there snoring very loudly now.
I've tried to wake her on many different occasions but she wasn't waking up she was out.
So I decided to leave her sleeping on the sofa
Other people were going up to bed.we were given the spare room downstairs it was just behind the kitchen
Only along the hall.
But as I couldn't wake her up I left her lying on the sofa snoring her mouth was wide open as she's sleeping.
I went to the room it was really tiny it was a sofa bed which I was lying on in the room but it was really comfy for a sofa bed.
It was only along the hall from where she was sleeping
I was lying on the sofa bed
Wishing the girlfriend was here.
I must have dozed off I woke up with my mouth feeling all dry since I was next to the kitchen I thought I would go and get a drink
I'm going to the kitchen I'm at the sink getting a glass of water.
I could hear heavy breathing coming from the living room where she was sleeping
I'm looking at the sofa I could only hear her snoring it's very loud believe me.
I went back to the room and got back on the bed putting the glass on the table next to the bed.
I got my phone and went back to the living room I was going up to the living room
I could hear heavy breathing but she's still snoring so I put my head around the corner of the wall I couldn't believe what I was seeing,
I got my phone and started videoing it I was seeing some guy he's got his cock inside her mouth as she's sleeping he's humping her mouth.
The sofa was a very low sofa this guy was kneeling down with his cock going backwards and forwards into her mouth as she's lying there sleeping.
She's actually sleeping with he's fucking her in her mouth.
I was watching it on my phone as he doing it to her.
I went back and made a noise in the kitchen and went into the living room knowing that he would have heard me.
He's not there he's away but he left a wee present over her face and inside her mouth
He's came inside her mouth it was running out of her mouth and down on the side of her cheek onto her hair which was under her face.
I'm looking around the living room checking to see if I could find him I couldn't he's gone.
I tried waking her up again but she is still snoring she's not for waking up.
I went back to the room looking at the video I couldn't make out who it was that had fucked her in her mouth.
In the morning she didn't even notice she was in the toilet throwing up.
It looked like she had a mark running from her mouth down on her cheek.
I honestly don't know why I didn't stop him I suppose I got turned on seeing another guy doing that to her.