Drizzi leads The Silvabois, a mob that owes great success and plenty eatz to an alliance with one of the Great Houses. Drizzi's getting on in years (she's over 20!), and the split with the Gravymourns has gotten some of the younger sprats thinkin' theyz can take over. She can't have that, so she needs to whip the Gravymourns to regain face and maybe thin out the ambitious sprats a little.