Ooo in what interview does she say she is surprised at J/7? Can you link it if you know it? I'm just curious.
And I think she probably meant she was surprised because Seven was meant to be like a daughter to Janeway and Janeway was like the mother figure. I'm pretty sure that's why she was taken aback and not because she isn't familiar with lesbianism in TV/Film.
It was something I'd read here, probably in this very thread, but it would have been a few months back as I was recently out of on-line action between 5/10 and 7/10. Possibly one of teacake's posts.
And yeah, I always saw Janeway and Seven as mother-daughter. If I were going to fantasize, I'd probably put Seven with B'Elanna. Or have her screwing Harry's brains out and it finally kills him with no alternate Harry to replace him. Or even with Neelix. But never with Chuckles.