Okay, let's see. From what I can see, we have the following threads open involving Momma Toki in some way or form:
Game - 03/08/998: Afternoon Return to Momma Toki's- The PCs have returned and given the Greb pouch to Momma Toki. Chronologically, this should be the last thread to be resolved- since Momma will be disappearing for some indefinite period of time- so we need to close out the others prior to this, at least in game time.
Game - 03/08/998 Late Morning Momma Toki's; Enroute to the Golden Coil- Looks like the guys here are done, waiting on Vrock. It doesn't sound like they actually need to meet with Momma Toki, since her cut was going to come directly from Mineranthese, so depending on how long they take, Momma can be gone with no issues. No need to stress over this one.
Game - 03/08/998, Talismarr Jubileum, Grolmin's Grindhouse - We need to go find Gregir's bloated corpse, and then be ambushed by ninjas. Or somesuch. We need to meet with Momma only if she's terribly keen on exacting some revenge from Kluh- otherwise her subordinates can handle it. Maybe feed the guy to some of Momma's "pets"?