My DD who is 14 months has recently started biting me and her dad and grabbing our faces and pinching really hard - it is not usually a frustration thing although it can be. How do you deal with this when they don't understand no? She really hurts us and I don't know what to do - I am really worried it is only a matter of time before she does it at nursery. I am also worried that I will react without thinking to a painful bite and I don't want to do that :(