Possibility which just occurred to me... how about disconnecting the potentialbomb's most worrisome detonator with frank bribery? Something like:
Sabrina: You have plans to disrupt the alliance I'm building.
QB: That's a fascinating accusation.
Sabrina: I'm not asking, just notifying you that I've noticed.
QB: tail swishes, declining to comment further
Sabrina: How many cubic meters of grief, at the density of my standard marbles, would be needed to convince you to abandon those plans? Either leveraging your influence to fully support Constellation's success, or standing aside to observe the unprecedented without interference. Regardless of exact quantity, 'Half today, half after Walpurgisnacht' seems logical, but I'm willing to discuss alternative payment schedules - or possibly other ongoing concessions, as proven by the reduced-visibility coating for my flight platforms. Also, on a related note, what's Earth's overall quota?