Hey cincystache,
I have a few years of parenting under my belt, so take this for what it's worth, but IMO kids are MUCH more interesting when they get a little older. Once they hit elementary school age, there's so much more you can actually do with them and talk with them about. Options for sports, writing, drawing, playing games, etc., really open up. If I were in your situation, I'd be really tempted to kill it for like 3 more years and then maybe go into "downshift" mode.
You've done a great job accruing $200K in investments at age 31. If you could crank out it out for 3 more years, each year investing about $20K (my guess after you take taxes and expenses from gross), and assuming modest (7%) market gains, you'd have a Stache around $300k at age 34.
That extra hundred thousand makes a LOT of difference. Let's say at age 34 you decide to shift down into part-time or something, earning enough to where you can pay your bills but maybe not be able to put much into savings. Again, assuming market returns of 7%, your $300K doubles to $600K by the time you're age 44. And it doubles again to $1.2M by the time you're age 54. And that assumes you didn't put a dime of your own money into investments from age 34-54.
Being so young, the more you can plow into investments now, you can see how time and the market can do most of the heaving lifting through your mid-30s and beyond. I am jealous!!