One of the most exciting experiences that I've had this year was reading the sexts between my gf and her ex-boyfriend at the time they were dating. So, no cheating involved.
Two months ago I was trying to sext with my girlfriend, but she was in a family trip and privacy was non-existent; so it was quite hard for her to take pictures. Besides, I noticed that she wasn't as horny as I was.
So I asked her to send me some photos that she had taken before, anything would do the trick; and things unfolded amazingly. The messages were something like this (I could copy them as they were written, but it would be a hell of a long post)
- Why don't you send me some old pictures that I hadn't seen? Anything will do.
- I don't have any; I only take nudes when I'm sexting.
- Well, haven't you sexted with someone else? That way, those photos would be new for me!

- No!

- Not even your ex-boyfriend?
- Hahahahaha. Well, you know I did; but that doesn't count. Also, I don't think you wanna see that.
- Why not?!
We continued a few minutes until she sent me a sexy pic she had sent to her exbf; she was still wearing bra and panties, but her legs were open. I felt like my cock was going to explode; but I kept pushing the boundaries until she started sending me more revealing pics every time. First her nipples, then her bush, her ass, and at the end, her wide open vagina.
I was excited as fuck and I could notice that she was even more excited. But we couldn't sext anymore because they had to go. I finished the job with a HUGE load imagining that I was the ex-bf, and I couldn't stop thinking about it for the next days.
When she got back from her trip; when were on my bed, I told how exciting it was to see those images, and she told me that she got so wet sending them. So, without thinking about it twice, I asked if I could see those messages. She agreed immediately.
She scrolled through all the conversation, until a sexy part. We started reading it while she was jerking me off. I got super hard reading how she wanted him to put his dick inside of her; or her ex telling her that he loved her nipples.
When we were halfway through, she asked me to stop, because there were some pics of him; and probably I didn't want to see them. But... I was waiting for that moment the whole week. We continued scrolling and I saw his dick pics. It was quite thick, but not too long. I got super hard seeing that hard cock (and the hardness was caused by my girlfriend) and my gf's responses like: "I want to suck it", "Put it into my pussy", etc.
It didn't take long for me to cum gallons of sperm. It was the most exciting thing of the last quarter.