The movie, I remember pretty vividly.

The dad I believe is trying to get custody of his two kids, a boy and girl, from his ex. His ex has short brown hair. She's a bad mom, does a lot of drugs. Has a druggie boyfriend.

The dad warns everyone about how dangerous she is. In the end, there's a chase.

The mom, her boyfriend are in a truck with the two kids. Somehow, the dad knows that the truck is going to blow up. In the end of the movie, the truck blows up and everyone in it dies.

I know this was on Lifetime.

Thank you!