All Comments on 'She Becomes His Slut'

Not a bad start, but I'd suggest moving it forward, developing this relationship and the character of your Dom's evolution into a Master of two slaves. Maybe alternating the point of view, the next chapter from the standpoint of slave, her view of how it started (maybe have slut ask her to tell her, since Sir/Master wouldn't because, "It's not his story to tell"). Then as the story progresses they develop into a poly threesome, get their own place, build the dungeon, the girls getting more into bi, adding in S/m. I can see this being at least potentially a 4-5 chapter story. You're a pretty fair wordsmith, and this is a good start, but it's only a start