I remember seeing it with Tom Paris too, when B'Elanna was part of the femslash pairing (don't know if it's still as prevalent as it used to be though). I really disliked it a lot. It was the first inkling I had that "you don't need to bash the canon love interest to get your characters together" works both ways. I'd already figured it out for guyslash by then. Oddly enough that canon female love interest was B'Elanna.