Dear S.,
There can be a stipulation in your divorce decree that states one parent cannot disparage the other in front of their children. Your attorney can ask the judge to order him to take parenting and anger management classes. (Be careful with this because you may be ordered to do the same). You could all go to family counseling. (This could be by choice or court order).
Since your children are telling you these things (i.e. setting traps and putting tooth paste in shoes), I would simply tell them if they did any of those things there would be serious consequences. My questions is, if you have decided to keep your “new” relationship separate from your children, how would they have the opportunity to put toothpaste in his shoes?
Also, since your child knew your boyfriend from the past and they know you are dating, what is the point of keeping him separate from you kids? By this I’m not suggesting you move in together or have sleepovers, I just think it would do less harm not to be secretive.
As for your child not listening to you and thinking you will attend to his every whim—NIP that in the bud today. Sit your children down, tell them your house rules and that they will obey, say please and thank you, eat when the meals are prepared and what is put in front of them. If they don’t obey there should be consequences. It will be important to follow through. Children going through divorce still need love, stability and discipline.
Your former husband sounds very immature, so you will have to be the adult here and don’t let him drag you down to his level.
Blessings……