There are two with a full, repeatable pregnancy cycle. No kids wandering around implemented yet—still figuring out how that should work mechanically. The data of how many exist is stored in code though.
Talk to her through the bars, then investigate the bag behind the prison.
Do you mean it actually freezes—as in you can’t move—or that you don’t know what to do? If it’s the first, I’ll need more details because I’ve never encountered that bug before. If it’s the second, you need to check the quest board at the back.