<human>: Can you provide a brief overview of the text?

I recently started dating a girl who has two children the youngest is 3, and the oldest is 5. 

Yesterday was my first full day spending time with both her, and her kids. We spent all day yesterday with them at the park playing on the park equipment, feeding the ducks, and what not. We arrived back at her house at 5 in the evening, and she put the kids to bed since they had fallen asleep on the way home. Later in the night I asked her why the kids hadn't came back out, and she said they sleep a long time, I didn't think much of it then.

This morning we wake up, we're drinking coffee chatting away, when I hear the oldest one yelling for her Mom. I asked her why she wasn't going and getting her, and she said she locked the doors at night so that they wouldn't get into things at night, or leave the house. I accepted the answer, because I didn't really think it was any of my business to voice my opinions about how she raises her children.

At 11 a.m. both kids are still locked in their rooms, both are awake screaming, and crying. I had enough, I half jokingly asked her when she was going to release her kids from their jail cells. She started getting mad at me, so I dropped the conversation. It wasn't until noon that she got let them out of their rooms.

I think that is is really wrong for her to treat her kids like animals in that way, she's usually a nice Mom, from what she's told me, and what I've seen the few times I spent a few hours with her, and her kids. I don't have kids, and never really have had to spend a lot of time with them, so I don't know if I was being the typical "know it all about parenting, when they don't have kids" type of person, or if what she was doing was really as wrong as what I thought it was.
<bot>: A girl I recently started dating locks her kids in their room even when they've been up for hours, is this in anyway acceptable parenting?