Bunny, I agree with all. DO NOT TELL BIL (I know you got that loud and clear, already)
Call the police, see what they recommend: parked cruiser, frequent drive-bys or just a heads up or code so if you have to call 911 you only need to give your name. Or address.
Why not have Cousin and Uncle close by since you intimated they are a threat to H's safety?
Would Pastor come by?
Use every ally, every piece of artillery, all your ammo and everything you got!.
And your hard-won conviction that you are doing the absolute right thing! ((((SB))))
Gardener
"My soul, be satisfied with flowers, With fruit, with weeds even; but gather them In the one garden you may call your own." Cyrano deBergerac