she really cant do anything, unless the kids back her up, this is about the fact that u are having a child with her ex, mention that u are considering filing a suit or slander, and if u can provide at least 2 witnesses, then she will lose, be sticky sweet to her, it will kill her, focus on having a blast with ur step kids and she will die inside. she wants the reaction, and if u and her husband, say, do what u want, and we will just see what happens, then she has lost the power