Welcome back!
Have you thought about putting your bike on a trainer while you need to be home with the kiddos? You can still get in some quality riding and it will help you build your legs again, but you will still be there for the kids. As you get faster/stronger, then you can move it outside. You will be able to ride faster so you can fit in a better ride in lesser time.
How old are the kids? Maybe put them in a trailer or have them ride along in a nice, car-free park area. Just a thought. Good luck and come hang out anytime.