I'll try to keep this short and to the point, but it does need a little backstory to understand where I'm currently at in my journey.

My first experiences with being cucked were with my boyfriend, I've posted about it elsewhere, but short version is, he would meet other guys but we never got as far as him doing so with me there - it was always me being told about it afterwards.

I'm now with an amazing girlfriend and we have started opening our relationship a little. Mostly on the kink side, but we had our first threesome (semi cuck scenario) not too long ago and she recently met a guy one evening to give him oral. I didn't know about this guy until a couple of days after but did have an idea what she was up to.

She's nervous about going further incase it damages our relationship, but she has a much higher sex drive than I do, so her exploring sexually with others could be really good. It always turned me on a lot when my boyfriend would tell me all about his experiences while we were playing, so I guess I'm just thinking out-loud and maybe looking for some outside perspective on the good and bad possibilities if I encourage her to go further.