Name issues

Husband has just remarried. The new wife insists that the children ages 8 and 10 call her mom or something like that. They call me mommy. I have told my husband that I do not want them to call her that and that they should call her by name. He refuses to listen and abide by my wishes. So the children are calling her mom. We are going to mediation. Is that something that will be resolved and will the mediator understand my wishes. How is this issue resolved?

This is an issue that can be resolved in meditation, or in court. Your position regarding this issue is not unreasonable.