You may not be in the best place for a negotiation today, Gemini. You probably aren't happy with all of the details of an agreement or arrangement, and you want more. While it should be fine to begin softly expressing what you feel is wrong with what's happening, don't lay all your cards on the table just yet. Part of coming out on top will involve being a bit of a mystery. Remain respectful and approachable, and you may get another offer without asking for it. Wait it out.