My ex has had visitation of one night a fortnight via consent orders for the past 5 years. He has floated in and out of my daughter's life in this time. He has now decided that he wants 50/50 custody of children. He does not work, does not pay child support, has very erratic behavior and acts like she is a toy. She has a very stable home life. Goes to a great school and lives with myself, my partner and another sibling. My question is would, it be possible under Family Law for him to gain 50/50 after only having one night a fortnight for so long???