In a divorce or separation, turning your child against your ex could have negative outcomes for you.
Negative Outcomes of Alienating Your Ex
Family courts are guided by one principle in resolving issues of custody: What is in the best interest of the children? Parental Alienation is considered so antithetical to your children’s best interest that an offending parent may likely be deemed unfit to be their custodian.
The courts are keenly aware that when one parent manipulates their children against the other parent, it can have long-term, catastrophic psychological effects on the children. In severe cases, it can be regarded as child abuse.
A court can impose remedies and deterrents such as financial punishment and charges of contempt. It can also award custody to the other spouse, including changing custody from a previously ordered arrangement.
Your children always come first. Leave your issues with your ex between the two of you. Involving your children can backfire and cause you to lose them legally and, ultimately, emotionally.