Yes: that you become a permanent member of the party till it desolves, and gain all the standard benefits of membership in a party.

"Just two things," you begin and immediately forge ahead, "that I become a permanent member of your party until/unless it desolves, and that I get all the standard benefits of party membership: a cut of the profits and items based on my level, class, and contributions; room and board when we have either; support/supplies for specific class requirements I migh have; a vote for what missions we take as a party, and indulgence/assistance for occasional personal/class-specific side-quests: you know, the basics." You finish, and she nods, but adds a proviso.

"I'm party leader and give the marching orders for this group, but, if everyone else is unanimous that we shouldn't do that mission we'll do something different: Basically I get the number of party members -2 votes and everyone else gets 1, agreed?" She counter-offered, and, with a little bit of miss-givvings, you extend your hand to shake on it.

"Deal." You reply and she takes your hand and shakes it three times, while transparent rings of glowing symbols the color of fresh-spilled blood in Elder Atlantian spell out the exact specifications of the bargain around both your hands.

With that settled you and the party set-off back the way they came into the paths of the wood, and you get to know a little more about them, like thier names.