I don't want to speak too soon, but it seems that the worst of the storm is over. My husband still has to work 20 hours a day to sort out the company, which, thanks to my FIL's drinking habits, almost collapsed, but it's getting better and the end is in sight.
My MIL is still living with us, though that should change as soon as she gets herself a boarder. My dh's father is now in rehab, after a huge fight and lots of threats of crashing the company so that we don't have anything to eat. We've decided to cut him off from the family... he's been drinking like that for 28 years, my MIL says, he's had all the chances in the world.
Things are still tense, but for the first time in weeks my husband was home last night and we could watch a little TV. The baby's doing fine, though with all the stress I've had to stop breastfeeding. My milk just dried up from the stress. I'm very, very sad about that.
So anyway, life goes on.