like most people who leave the adf apparently she's not crazy about them so between that, his reasoning being the rescue mission, AND vash to vouch for him she's more than capable of looking the other way as long as he isn't somehow inhibiting her work by being on the lam somehow. she'll give him the same line she gives vash when he gets mixed up in an illegal mess: "don't do this again because i'm not fixing it AGAIN" but then she does anyway