after more or less succesful tries with the search on this site, I decided to ask you for help in finding a particular type of story.
I would like to read some stories where a wife or girlfriend in a straight relationship takes a female lover.
There isn't much more to my request. I don't care about the level of sex involved in the story. I don't care if it is cheating or if she asked for consent from her partner (or was encouraged). I don't care if a threesome/polyamorous relationship develops or if the couple breaks up. I don't care if it is from the point of view of the husband/boyfriend, the wive/girlfriend or the lover.
I would prefer it if the relationship between the women is more or less the center of the story.
Thank you in advance for any and all help!