Hissy: You sound like you've got the t shirt. Time to get a grip.
thanks, but I don't need one. I'm not the one apparently standing by while my daughter's being harassed under my roof.
By all means comfort your DD, she sounded as if she did need it, but you need to get your DW to sort out her issues as they are impacting on the family. With meaningful consequences for if she doesn't. If you don't follow through, your DD will see that nothing has changed and that she has no right to expect a peaceful nights sleep if her DM decides to kick off again. Your failure to put a stop to this endorses and enables her DM to mistreat her, and invalidates her own feelings.
You are a member of this family and as a supposed lucid and rational parent, you have to step in and tell her that she can not treat anyone like this, much less your DD.
Otherwise who will stop this from happening? Who will prevent the harm to her self esteem?
Look at the dynamic you have there and compare it with normal households that don't have going on and ask yourself why DD'd not run for the hills at the first opportunity she can get? As soon as she goes to higher education and sees real life, real families and compares what she has with you and her mother, what will go through her mind?
A mother who kicks off and a father who enables it by failing to insist on consequences.
ANY woman who came on here and said that their DC dad kicked off like that at their child would be told to LTB, and for her to protect the DC. Why should the advice here for you be any different?
Your DW is being manipulative and controlling and living with a person like this is harmful to all that come into contact with her.
Stop making excuses, stop minimising what this woman is doing to your family and safeguard yourself and your child before it's too late.