There are some ideas and principles in matrimonial and family law that seem to be tested over and over again only to be confirmed time and time again. For example, if you try to interfere with the relationship between your child and the other parent, you’re going to lose.
On Modifying Custody Agreements – Fostering the Parent-Child Relationship
There’s a hefty price to pay if you interfere with the relationship between your child and the child’s other parent: loss of custody.
In Fargasch v. Alves the court found that the mother had made unsubstantiated allegations of sexual abuse against the father which showed that the mother placed her own self-interest above the interests of her child and consequently held that the best interests of the child required a change in custody from the mother to the father.