She lost her two brothers in the last war, one of the Weasley twins has just died, and the daughter she so desperately wanted after having several sons is apparently the next one.
After all, we saw her Boggart in the fifth book � her family dead. As if the thought of a mass-murdering fascist casually walking near children isn�t scary enough, Voldemort himself notes that with one small flick of his wand, the child would never reach his mother (he doesn�t go through with it, though). One child compliments his costume, but runs off back to his mother when he is intimidated. Voldemort openly walks on the street on Halloween, with numerous innocent children around him. It gives a parent a sense of failure to protect their child, that they're weak and powerless. He tries to come back almost immediately, but circumstance prevents him from doing so.
Achilles in His Tent: Ron gets fed up with their extended camping trip and storms off.