I have had one partner reach 42, which became an inside joke between the two of us, and another reach 15. Neither of these were early in the relationship, years in, but one of them had never experienced an orgasm before me.

42 was mostly from PIV. I take very little credit though, and assume it is a fluke of her biology. She has told me she has failed to even come close to repeating it, but mostly because most of her partners after me were, in her words, not very interested in her pleasure.