When the Star Destroyer presents it's rounded sack port to you do not be frightened. It is a basic mating ritual for the Star Destroyious. Destructum de la illuminea feature several different stages to courtship of another mate. Presentation of the rounded sack port. Opening shuttle bay doors. Intermingling of exhaust fumes to determine compatibility. Tractor embraces with radio communique. It's final courtship is when it enters into half-hibernation modus in order for it's partner to get up close. Then it's intercourse commences impregnating both partners with offspring to ensure maximum population. So long as you do nothing to further provoke mating the Destructum de la illuminea should leave to find more interesting potential mates.

(Yes, I just wrote that.)