I was close to my cat and she began to purr and i pet her, she put her belly up and i kept petting her head but she took her claws outs and held my hands (she didn't scratch me at all) and bit me, it didn't really hurt but im unsure if it was a love bite or an actual bite... It's weird because she would never bite nor scratch me, she usually smells me and put her claws away or takes my hands away with her paws if she doesn't want to be petted.... And after that she went running to her sister and began to bite her, then they started fighting?? Their tails were moving really fast from side to side. They fight very often but they also love eachother... Is all of that normal? If not, what can I do?