Seriously! That's why I liked Rose. She could handle herself. She worked things out. She worked out entire plot of The Idiot's Lantern, and I can't count the number of times she made the Doctor (nine and ten) go 'oh, yes!'
Billie Piper-Let's pretend this is Rose a couple years after she and "John Smith" (wink!) got married and had kids in that alternate universe. She's now a wife(!), mommy and brilliant "fiction" writer. Yep.