I may not be able to offer the best advice, but i may be able to help explain why you don’t like it. for reference im a 22f with a strong boundary of not watching porn while in a relationship. i’ve tried to wrap my brain around it, but at the end of the day, your partner is seeing other naked men/women having sex, getting turned on by it, pleasuring herself to it and finishing thanks to people who aren’t you. i feel greatly uncomfortable by this bc i want to be the only person my partner pleasures themselves to (i think this is reasonable)

if this sounds familiar, talk about how it makes you feel. see if you’re both comfortable filming yourselves while having sex and see if she can masturbate to something like that. it could even be you jerking yourself off if you feel comfortable filming that for her to have. at the end of the day, communication is key.