It’s fairly normal if you don’t have a dominant rooster in the flock for one of the hens to take on part of that role. She might break up fights and keep peace in her flock, watch for danger, or even call them over for food. I’ve never had one crow but I’ve had one that would go through the mating ritual with another hen, usually a pullet. That doesn’t mean she was twisted or warped.
The mating ritual is not just about sex, it’s a dominance thing. She was reinforcing her dominance over that pullet. When there was an immature cockerel in the flock that tried to mate another pullet or hen she would knock him off to show her dominance over him. Eventually he matured enough to dominate her, but it took many months, almost a year.
What you are describing sounds perfectly normal to me. It’s chickens being chickens.