Is this a modern novel or a historical novel? If it's a modern novel, then probably not, as 15-year-olds are not legally allowed to work in the US without parent permission, and even then I don't think they're allowed to work full-time jobs. (Also, what kind of responsible adult would hire a teenager to clean their house/take care of their kids full-time? Eighteen, maybe, but definitely not fifteen.)
If it's a historical novel, then go do some research on the time period. Libraries and the internet exist for a reason.
Also, if you just started this novel, I wouldn't recommend jumping to show it off ASAP. A) A lot of beginning writing attempts are trunked before Chapter 6, B) if you actually do finish this draft, there's a good chance you'll realize that you're starting the novel in the wrong place, so the Chapter One everyone worked so hard to critique won't even make it to the book, and C) it's usually courteous to critique a few other people's writing samples before you ask them to do the same for you. I know it's hard to be patient and that all of us can't wait to show our writing to the world as soon as it lands on the page, but asking for critiques this early in the game will only waste a lot of people's time.