She's an OB nurse (was, rather - she's officially retired, although she still works one shift a week), so I suspect that has come into play with her abortion opinions. Although I suppose that could influence someone toward the other side as well.
My step-brother and I are the only two lefties on my dad's side of the family. We mostly avoid talking about politics, although when I'm home, I get a front row seat to my dad's rants, usually spurred on by Fox News.
They're very passionate, which is nice, but it's on ALL THE TIME at their house. It's like they're afraid to change the channel, lest they miss some breaking news that signals the end of the world. So there's always something being talked about that will set one of them off. Usually my dad, which means he's in a shitty mood for the rest of the day.
Good times.