Well you CAN keep a male Betta in a tank with girls.. It's not impossible, usually a difficult but it can be done. I haven't but a close friend of mine had her male VT in a 10 gallon and added 2 females. Not to breed, but just to have them together. They never fought and were all happy together for months. So it's not impossible that your little girl is a boy.. I'm not saying she is, but you never know. The more recent photos I see of her, I would say she is a he.. You never know though.