I read this short story in an anthology from NMSU library in the 1980s. It had adult themes, and I still can't forget how shocked I was. Possible author was Stanislaw Lem but I might be wrong.
The main character was Swedish, 14 years old and named Mara. She was on a spacecraft because she had the rare ability to communicate with Earth and other ships faster than light. She was very unhappy, and was friends with the only other communications person like her on the ship, but he was only friendly while they were working.
Mara finds a nearby black hole interesting, and somehow manages to either draw the spaceship closer to it or actually expand the Schwarzchild radius surrounding it, as an act of defiance and unhappiness. She wants to be back home on Earth. The story ends by saying Mara's name means little nightmare.
I remember other details, which I can provide if needed. I can't remember the author's name or exact title though!