I sincerely doubt that there's going to be any problem with secondhand vapor UNLESS you literally have a cloud hanging around you. As I've never succeeded at making a cloud unless I wasn't inhaling, and I tend to inhale so that I can get the nicotine in my juice, this is a very rare situation for me at best... and even then, that cloud is confined to at most a foot or two around me and is gone within (at most) a minute. Analogs would leave smoke hanging in the air for a LONG time. Vapor just plain doesn't stick around that long.
The question then becomes whether you -should- vape around them, and that other thread that's been mentioned has a lot of opinions... but that's really a personal call. I do vape around my family, but I don't tend to have PVs/liquid where minors can get at 'em. And to me, that's enough. Everyone's a little different on their parenting views, though.