So my LTR and I have an awesome sex life, we can't get enough of each other and the relationship is really strong (yes I have been prioritizing myself first, not her). The only minor issue I have is when we have sex, she expects it to be always orgasm-for-orgasm. If I cum and she doesn't, she gets annoyed or begs me to make her cum, or brings it up the next time we have sex. I have told her "I don't keep score, babe", but it doesn't really affect things. I love pleasuring my girlfriend, but it's really hard for her to cum from PIV only and I don't like going down on her pretty much every time we do it. I have tried not cumming myself to emphasize the "I don't keep score" part but her mindset pretty much stays the same. There's no spontaneous blowjobs or anything because then she expects me to do the same back to her. Advice on how to proceed here?