A Texas mom allegedly tried to drown her three kids in an attempted murder-suicide plot last month after drugging them with Nyquil and tequila and then leading them into a pond on their sprawling estate, authorities said.

Jessica Quintana, 37, was found unresponsive in the water with her three children — ages 6, 11, and 15 — when cops were called to their home in Dayton back on Sept. 29, KHOU11 reported .

The mother, who was hit with a slew of charges on Monday, is accused of trying to kill the kids when her initial plan to pack up and leave the family home failed, according to the Liberty County District Attorney’s office.

“Plan A was to pack their belongings and to leave the residence. Plan B was only to be enacted if they could not leave,” the district attorney, Jennifer Bergman, s

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