OMAIGAWD, yes, she would definitely scare him. to the point where he'd take one look at her, see her MADDOG!face (which doesn't necessarily mean that she's actually shooting an angry look at him, i think he'll see her as frightening regardless what kind of face she has) and then cast a sleeping spell on her. then run away. super fast. like the flash fast.
most people seem to take joy in scaring him because he's so easily intimidated, he's a big wuss. but if he ever bypasses that whole "she's scary, truly a witch of...wherever she came from," then i can definitely see them getting into heated arguments about...well, just about anything.
i can almost picture them being that typical old people couple who fight over EVERYTHING, even something as little as why the peanut butter was left on the counter and not put away. only, of course, without the whole marriage thing. these two would just annoy each other to no end. which is always fun, right?