The Long Island “hit mom” allegedly caught on video plotting to have her estranged husband killed so she could cash in on a secret $500,000 insurance policy is set to stand trial this week.

The mother of four, Susan Williams, 43, of Garden City, allegedly wanted hubby Peter Williams, 46, bumped off for the bargain price of $20,000.

She has refused a plea-bargain deal and is scheduled for a hearing today in Mineola.