I am posting a question for my current partner. So here goes. My partner had a child to a woman years before he married his then current wife. The child eventually had interactions with his biological father and they both were trying to build somewhat of a father-son relationship. The father being married to his then-wife conceived and have 5 daughters who have considered the father's biological son as to be their brother. While the father was out of State working, the biological son has had sexual relations with his father's wife. The father eventually became aware to his wife's sexual encounters with his biological son to another woman by his daughter catching her mum and brother in the act. Now the wife has placed an avo on her husband to restrict him being within a 1kilometre radius from the family home, which also has stopped him in seeing and having contact with his children. Isn't it morally and legally wrong under family law for the son to live in a dwelling and have sexual relations with his mother-in-law whilst his sisters are seeing their mum sleep and have relations with their brother? Please help.