Yes she is dedicated to team cohesion.
As she really dont need to do anything to shelter her sister from backlash. Parfait is to well connected for people to give her more than a slap on the wrist.
While Dabbler is to well connected, to important, and socially skilled enough to not suffer any backlash herself whatsoever.
That being besides having the excellent shelter of "i wasnt around" and "it was not me, do you want to be held responsible for every single bad thing humans does?"

Besides that Dabbler has strict rules against "bonking" people on the team. And should as an experienced succubus be able to melt away lingering resentment in like 30 sec if she wanted to.
Instead she took a small chance doing something that might actually generate more resentment. And made her sick as heck.
Just to ensure "the edges were blunted". Well. At that page she also stated the base needed a serious "bone down".