[Well gee, Mickey, maybe you need better security?! No one's ever dared attack the Phantomhive Manor twice, Ciel's defense team makes sure of it. Well, that's mostly because they're all dead but that's just minor details.]
It sounds like you have a leak somewhere. How else would they time it so well? [Okay, okay, so maybe his wife is his first priority so:] Is she defenseless?