I have turned out the lights and gone to bed many nights, just havent locked the doors.
I don't know of any place these days that people are safe in their homes at night going to bed and not locking the doors. Doesn't she have a key? By you leaving the door "unlocked" you might as well be standing there with your arms held wide open for her. It makes a statement about you.....and not a good one.
I agree that a man should let his W know how disrespectful she is behaving when she has children at home and she's acting like a wild irresponsible teenager. If I were in your shoes, I would let her know with no mixed words--and then the next time she come home late....she would not find her H & kids there. I would find someplace to spend the night and the next day. I would not give her any idea that what was going to happen, not leave a note for her to find, nor would I call later....b/c she apparently shows no concern about her family while she's out. The shock of coming home to find her family gone, might do her good. At least you would be underlining the statement you made.
Sandi
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!