She's just keeping that animal for her own gratification and attention seeking. It's good that she saved it. She obviously knows what she's doing and all credit to her for that. She should now be trying to release it back into the wild. That's where the animal belongs, not become a subject of fawning on tinterweb.
From what I've read, zoos in Russia are far behind anything here. There may not be rescues for the rehabilitation of big cats either. This may have been the only option. I just hope the cat never rebels...
10c
Once she realised that humans = food she would have been totally unafraid of humans and would have ended up being killed or become a pest.
I'm childish enough to want a pet Tiger. A domestic cat can inflict some painful injuries when it doesn't get its own way. A Tiger could decapitate you with one paw if you run out of Dreamies. It's not a good idea :-)