ste is victoria's second prisoner, the replacement for korg, in a way. Free him, get him to like you, make him visit bareshade and you should unlock a "country road" quest. After you complete that quest, ste will visit you
hey! I dont believe it is a bug. You can access the bad ending if you carefully let all three lost acolytes have sex (also you must give a lust potion to rhot). This requirement is just not specified, but only through it can you access the ending in question :))