There is your answer on contentment. Family first.
You work a .8 on your regular job (about) and then I'd guess pick up enough home care hours that you functionally work full time - possibly even better than full time during the school year. But if you aren't, someone has a point - you are doing darn well for a single mom who is living off a single part time income.
And you misunderstand taxes - You may see more taken out of your check when you work more because of a move to a different bracket and the payroll system assumption that you'll need all that held back, but because tax rates are marginal, its impossible to not come out ahead financially - at least by the time you file.
And yeah, sometimes kids are such a bummer financially. My childfree friends are sitting on a beach in the Dominican Republic right now.
I'd also recommend getting off this board if you aren't content with your financial situation - and certainly do so before the Black Friday talk starts. Get over to frugality boards, where they make fun of Black Friday. This is a budget board, but its a budget board on a website that caters to one of the most consumerist companies in the world. I suspect that most people who hang on this budget board are not single parents on one .8 income plus some side work - prior polls - for what they are worth - put our average household income as a group well over the national average. Around here it can seem like everyone else is getting to go to Disney World - and almost everyone else is getting to go eighteen times a year (I'm exaggerating a little - but then, I hang on the DVC board as well so my perception is skewed towards frequent visitors). And there is always someone who, for instance, will post to a thread on American Girl that their daughter had several hundred plus dollar dolls. It can make you wonder what you are doing wrong. If you start reading THOSE sorts of boards, we budget boarders (with the exception of a few people like barkley - and a few others who manage frugal and a love of Disney) spend like drunken sailors.