The Black Hole is the desperate lover, the force strong enough to bend everything and ripping it apart.
Upright it means enormous power and powerful attraction. (Romance life or business/political)
Upside down it means absolute dependency, destructive negative power and pulling others to hell with you.
I'm bad at this.
Anyway, I made up a story about it-- since blackholes are originally very bright, blue stars, then she was first a very good, loyal lover. But then her partner died and she, in grief, turned to the devil, but that didn't bring him back. She exploded to show her anger, but she turned into a blackhole due to her power.
For a contest at Seventh Sanctum.