Females react differently. Some hide alot, some want to help in the nest making. Some get bit in the butt, and run and hide. Some just swim away and come back for more. When the female is ready to be wrapped, she will cuddle with the male. They go in circles until they line up right, and she rolls on her back and he wraps her. It takes awhile for them to get it right, usually. I had one pr that started the minute she was released. When she is ready, she will go submissive if he nips her. her head goes down, and she turns her tail towards him. Most of the anal fin nips come when this first starts to happen. After they are done, the males bites the back behind the dorsal, hard. The longer you leave her in at this time, the more damage to her back. Scales can even be torn off her. The male is trying to drive her away.