Well, I'm pretty sure I know what K'rrzina is saying. As for Friskella, she'd probably be complaining about something given her expression. Maybe about how she's always having to look after K'rrzina, even though secretly she loves to be needed.
Heh, I've never revealed what is in K'rrzina's head directly except for her flashback scene in K1. Anything after the Priatoris III event has been something we're not privy to, except for what she reveals through her expressions. So, even though I might know what she could be thinking, I shouldn't say.