she’s never been one to get in the middle of anyone’s affairs, even to her own detriment,
ERROR
The sentence should read “…especially to her own detriment.” Using the words it has now makes it seem as if the word “detriment” is a good thing, which it is not. The wording makes detriment seem interchangeable with “reward” or “benefit” as in “…even to her own benefit,” which again is not what he’s saying or should be saying.