I have a pair of mute swans and a 2 year old swan (their daughter). The male seems to have divorced his mate and has taken up with the daughter and has started running his mate out of the ponds and biting her. The cob has mated with his daughter, but she seems to be not interested in sitting on the nest, the cob is doing all the sitting, which does have eggs laid by is mate that he no longer wants anything to do with except to chase and bite. What should we do, if anything? Thanks