My sister has a female and a male betta. She asked for my help in breeding them. The male betta has built a nest but i don't know how big they are meant to be. I asked her if i could put the female in and see if they did anything. The male betta started rubbing up against the female but the female swam away. It seemed that the male betta got frustrated and wanted to attack her says my sister. He was flaring his gills at her. My sister screamed at me to fish the female out. Its not my fish so i can't leave them in there to see what happens. Any suggetions??