getting desperate. He has zero tolerance of her. He looks at her as if she is the mud on his shoe if she touches him, resents her very existence to the point where he gets cross if she is laughing or making any noise. I have tried everything. Giving him one to one time with me, involving him in nsppy changing, bathing etc, trying to do things together they both enjoy. He will now hit her or knock her over the moment my back is turned. I always put him on the naughty step and he will say sorry, but then does same thing a few mins later. I can understand how it changed his world when she was born but did hope things would get better and now getting worse. Any ideas?