MIL drama

Suffice to say, my MIL has caused so much drama in our lives. One thing after another. I finally had to say our kids cannot be left alone with her, after kiddo turned gas stove on and when we pointed it out she accused us of making it up, and throwing a fit because when she asked to pick kiddo up I said sure but he is getting ready to nap I will call you when he is done (and she called my husband at work over it and bad mouthed me). We told her and her husband not to pick kiddo up from daycare one day and they said they would do it anyway, and don't care if they go to jail over it either. So we had to revoke them from our list of ok people to pick up kiddo from daycare. we do not deprive him of any contact (he adores them...ugh), but one of us is ALWAYS present. Now months later, MIL tells us her mom is dying (my husbands grandma who has zero interest in us, and never wants to meet me, wont speak to us on the phone even) and that shes asking to see kiddo (not us of course) and she is buying a car seat and wants to take kiddo to see her far away. I will be nearly 38 weeks pregnant at the time. Our arrangements are my dad will watch kiddo when I am in labor. He is so good with kids and I trust him wholeheartedly. These people have basically threatened kidnapping my child in the past and I do not trust them to adequately supervise. They also live near a pond (kiddo is 3 and cant swim) and refuse to watch him at our home. I do not want my child left with these people if I happen to go into labor while he is with them (tbh i had no intentions of even notifying them when I was in labor. PERIOD) i told husband he is more than welcome to drive his kiddo and his mom to see grandma any time this week, or his mother can bring his grandma to town, but as with everything else, if it's not my MIL way, she will twist this into me being the bad guy. The last huge rant she did was right when I lost my first baby to miscarriag (kiddo technically my step child but hes just like my own in my eyes). So I guess I'm just ranting that she seems to time out her rants to purposefully attack me when I am most vunerable.