WW in MLC affair and I need advice..

[Natash]

Another quick update. My W went out with a "friend" on Friday night for dinner and never came home. I told myself I would not ask any questions, don't need to know details and act like I'm moving on. But then I had a setback. My D7 woke up at 7 am and frantically searched the house for Mom. She then came to me and said "Dad, Mom didn't come home! Her cars gone and she hasn't answered her phone! I called Grammie (MIL) and she texted Mom but didn't text hear back." MIL said maybe she was getting her nails done. I got angry inside and said my MIL better not start making excuses to my girls and went into protection mode. When the phone finally rang half an hour later I told d7 not to answer it and I did ( looking back I should have let her answer it). I said in a stearn voice to my w " you want to tell me where you are and when you'll be here? She flipped the table and said " yeah, like you tell me where your going and when you'll be back!" I said I let you know I'm going in town and I always come back the same night. I have two girls asking questions and I want to know what I'm going to tell them." I almost said heartbroken girls because they were nervous and upset but I remember reading not to bring the kids into this or make the S feel guilty. It was tough because I wanted to show my girls I am there to protect them but didn't want to persue the W. I did reassure the girls that mom would be back. Then a thought crossed my mind, what if she was in trouble? I'd feel terrible. I never called her to know where she was or what she was up to. I acted like I didn't care. Later she told me it wasn't planned for her to stay overnight (not that I believe that). I think she is out with OM and know she'll say she was out with a friend but regardless, I feel powerless in this situation and would take any advice on what to say or do and what not to say or do.