I've been dating my girlfriend for four years. We eat, sleep, and laugh together, and I think our love has grown. But it all started one day when I secretly looked at her phone. I saw a message from a man I didn't know in her chat history. What's this?! There were photos of Yuhi sleeping with another man, looking wild and disheveled. She's different from when she's with me. She's a masochist and completely submissive to her cheating partner. It's frustrating...but despite those thoughts, my dick is rock hard. Since then, I've gotten into the habit of secretly looking at her phone, like I'm shoplifting. I check to see if there are any new videos. And I find myself masturbating to them. It seems I have a cuckold fetish. She's finally found out. We should break up...no, I don't want to. It seems she doesn't want to break up either. She loves me, but she can't forget the sex she had with her cheating partner. And I'd rather see Yuhi getting even more messed up. I want to see her bark like a dog while she's being roughly fucked and collared, deep-throated. She even allows me to cum inside her, something she's never done with me, and even makes peace signs for the camera, dammit! ...I couldn't get any more turned on than this. The girlfriend, addicted to cheating dick, and the boyfriend, who has fallen in love with being cuckolded, share the same sexual fetish, and share a strange relationship where they understand each other's hearts. I still don't know if it was a good idea to sneak a peek at his smartphone back then.