no.. when byakuya was a kid, Yoruichiwould play pranks on him and goad him into games of tag using flash steps,which she won every time. yorouchi would also teach byakuya some of her techniques ncluding one called utsusemi which allows Byakuya to mover out of harm's way while leaving an afterimage behind.
so the answer you were looking for is NO. Yoruichi may have been Byakuya's mentor on shunpo and enjoyed tormenting him por shoving her breasts in his face.He just found her annoying and still does to this day.Overall normal relationship
