The ones I can think of are:

Kelly Madison
Brandi Belle shoot with others before but in her last years with bf only
Nicole Sheridan shoot with other guys but mainly her husband

I personally prefer seeing women being fucked by strangers or a dude that they're not in a relationship with because that just makes it all the sluttier 🤣 when I see a couple on camera I pretty much can't get turned on.

Like I always thought Kissa Sins was hot but after a while I couldn't take another scene with her and the legend Johnny Sins. Now I watch her getting filthy with other guys and she's amazing ❤️

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Now if the question had been how many performers started in porn only working with their significant other or mostly worked with their significant other than the number would be bigger but most of them transitioned to work with other male performers because if they hadn't then their career would have been much shorter. A good example of that is Jezaree who primarily only did b/g with her husband/boyfriend Robbie James but still managed to do a few scenes with other male performers. Now we will never know if her career would have been much longer if she had been willing to work with many other performers than Robbie but compared to most of the women who worked in the same period. her career was both short and quite small with only 35 titles to her name.

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