Is it something she does all the time? She probably feels that when you complain about her not calling, you're controlling her or keeping tabs on her like a parent.
Does she tell you where she's going and when she's coming back or does she just disappear? If she says stuff like she's going out with a friend after work, you could just ask her around what time she might be home so you don't get worried.
If she has been going out alot and neglecting her duties as a mother, then politely remind her that the children look forward to seeing her and want to spend the time with her. Or something like that.
You can't tell her that she can't go out after 10:30 because it isn't proper. That's your issue and not hers.
Are there any other examples.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.