Slightly dodgy. That's a bit of an understatement. She wouldn't have bothered putting herself into this miserable state if she wasn't trying to cover up a potentially huge blowup that could have seen her sister arrested.
I continue to be shocked and amazed at the hoops people are ready to jump through, just to justify a personal dislike of someone.
When the simpler explanation "she does it because she care for the team" basically screams at you.

And it overlooks a massive key point.
That what made Dabbler sick, was keeping the aura up, after Max had made her verdict of "fine it was an accident, but your banished from the base".
If she only cared about her sister, she could have gone to bed then. Since she cared for her team, she spend all night riding up and down an elevator.

And as a side point. There was absolutely zero chance of Parfait getting arrested for this. At worst detained for an evening until pickup could be arranged.
But Parfait is simply to well connected to get in actual trouble for a honest mistake. Daughter of a Succubus Matron.
Sister of Dabbler. Slave of the Demon Lord Tom. Either of those 3 have the influence to bail her out.