Bradley needs to kind of do a Kate. That way Sean might not be on such terms with Bradley, because it would be better that there was something that proved he would put Sean's mind at rest and take care of Stacey, rather than being carrer obsessed, possibly even leading Sean to believe that he's dating his sister for image's sake. Not that it'd need to be exactly that way, because no-one really need know at Bradley's place of work if they actually reunited.