Okay, that wasn't the slime girl... but that still doesn't make any sense, without any input from Rebecca, who knows how the future plays out, things should be going exactly like they were before the time slip!
What this shape-shifting girl is saying happened before they charged into Drakken's ship, which means Labilia shouldn't have been released! Unless the shapeshifter was the one tortured in Drakken's prison in the timeline 29, this timeline 30 makes absolutely no sense whatsoever! Things are changing without Rebecca's input!
Edit: Okay, it was shapeshifter girl all along in timeline 29... why wasn't she tortured in the first place? She was beaten up and gagged up in 29, but now that they've come to rescue her she's fine?