No, the B&W one is a stray. If it's the one I think it is, it's the mother of these guys:
http://forums.somd.com/cats/208483-who-wants-kitten.html and probably older sister to these guys:
http://forums.somd.com/cats/185536-gonna-try-catch-stray.html
As a rule, our cats don't go out. When they do, they run right back in if they think they might be forced to actually stay out more than 5 minutes. In fact, the one that's missing got out a few months ago by accident. Huntr forgot that one of the window screens was busted and he opened the window. The cat was sitting on the sill and sometime during the night, fell out the window. It was only an 18-in drop, so he wasn't hurt, but you should have heard his pitiful cries to get back in.