Versions of pop star Vanessa Amorosi’s bitter legal battle with her mother in the Supreme Court of Victoria are playing out in courtrooms across the country as family members dispute property deals, wills and informal agreements.

Different recollections of “Bank of Mum and Dad” loans, rows within blended families about who owns what, children’s inheritance impatience and the rights of adult children living at home are increasingly being settled in court, say lawyers.