I’d just act and be homeless for a while. Nobody gives a fuck about them. Sleep on the street, panhandle a little, then after a year or so start planning your way to Mexico.
You got about 8 months to stack some bread get to it. If she’s broke too, benefits will help her. Kids don’t get super expensive until daycare is needed. You or her can find groups on Facebook that donate children clothes all the time. They usually are very clean and sometimes