Cucked By My Housemate

My then girlfriend was very always very flirty with my housemate. It's so cliche but he was a body boulder type and very cocky & arrogant.

Anyway one night the guys were having a bit if a gathering and he had invited my girlfriend to it. I was working playing a gig that night and I'd be back home at maybe 3am?

I keep getting texts from my girlfriend about how fucked up drunk she was while I was working. I didn't think too much of it until she said she had fallen over and hurt herself.
By this time the gig has over run and I have to find a hotel to stay the night at.
I try calling her over and over...no answer. I'm beginning to get worried and then a Snapchat comes through on my phone from her.

I open it and it's her sucking my housemates dick. Not just sucking it but like really sensually deepthroating it, basically going wild. The caption said "She's busy, boy. Call later."

My heart sank, I was furious and sad at the same time. By this point I'm alone in a hotel room and it looks like a sorry state. I save the video to confront her with the next day and try and get some sleep but all I can think when I close my eyes is her sucking his dick.
I try and call again to confront her...no answer again.

Then another snap comes through from her.
This time he's fucking her from behind, no caption but I hear him saying
"Didn't I tell you she was busy?! Fuck off!"

The worst part was that I had to watch the video multiple times to work out what he was saying because I could barely hear him over my girlfriend moaning and calling him 'baby' and stuff.
It was at this point that I noticed my dick was hard as a diamond. Having saved both videos I replayed them over and over and ended up jacking off to them. The mixture of jealousy and horniness just flooded me and I shot a huge load from one of the strongest orgasms of my life and pass out on the hotel bed.

I drive back in the morning and get home at around 7:30am
I get home feeling weird about going over to see my girlfriend, knowing she's cheated on me.

Well there was no need for that because she was still at mine, in my housemates room. I hear her voice and giggling and then, of course, to rub it in, they fuck again. Loudly, like before.
It's so embarrassing to say but I quietly went to my room next door and jerked off to the sound of my girlfriend getting absolutely pounded by my room mate.
What is wrong with me?!