That’s what this whole thread is about isn’t it? She is behaving like an irresponsible teen!
I disagree. I think she's acting like an adult who's not used to reporting in to her mother. I don't see how going out when her daughter is with their father is being an irresponsible teen at all. Should she be sitting at home, staring at the walls, waiting for her child's return?
Now, I do think a quick text to say, "Hey, not coming back tonight." wouldn't be a hardship, but I can also see where, "I'm a grown adult, trust me to make my own decisions." can come into play.
I think the best solution is for daughter to get her own place ASAP. No more worries about locking up for OP, and freedom to live an adult life without censure or supervision (or even just the perception of such) for the daughter.