Mom!Nina creeped me out, too, but she seems to be a genuinely decent person - and this is another thing I think is really interesting about Fringe, that they allow people to be good, bad or in-between regardless of what their other-universe counterparts did. It's all about the choices you make.

I'm not super fannishly invested, though, which is probably a good thing. I expect I'll be watching in season five, if there is a season five, but if things keep going like they have been, I'll probably be bailing eventually too.