First time being cucked

So yesterday I finally became a cuck. We'd been chatting with a guy all week and made plans for him to come round at 12:30 on Friday.

So Friday came and I went to work while my girlfriend was at home getting ready for him. As 12:30 got nearer she messaged me saying "not long now" and I could feel the adrenaline building in me.

Then at 12:30 I get a message from her saying "he's here" I reply telling her to have fun. Then after a few minutes I receive a message from him with a picture of our bed saying "look familiar"

My heart is racing at this point and I'm constantly checking my phone waiting for the next message. Then it arrives and I see it is two videos.

I nervously open it and wow! There is a video of my girlfriend with his cock in her mouth sucking it and taking it to the back of her throat. The second video is him fingering her until she cums.

I'm so turned on but have to act casual at work. So I try and go about my usual day but my mind is racing.

Then my phone pings as another message comes through, just one video this time. I open it and see him putting his cock inside her from behind. He then begins to fuck her with long powerful strokes and I hear her moan each time he goes deeper.

Then he smacks her ass leaving a red handprint on her cheek. She clearly loves this as she moans louder.

All I can think is that right now in our bed there is another guy fucking my girlfriend and there's nothing I can do about it.

Then another message, another video. I open it and see her laid on her back being fucked by him as he grabs her tits and she moans "its so good" he asks her "better than your boyfriend" to which she replies "much better".

I'm so turned on by this but have to keep it cool. I sneak off to watch the videos again and again transfixed on seeing another guys cock go inside her.

After a while she messages me saying "he's gone, that was amazing" I reply saying "so happy you enjoyed it, can't wait to get home"

When I get home I go straight upstairs where she's laid in bed and immediately begin to fuck her.

She tells me how good he was as I try my hardest not to cum instantly, then I watch the videos of him fucking her and that makes me cum so hard inside her.