The mom was arrested, and eventually charged with capital murder, after authorities discovered the bodies just before 11:00 a.m. local time in Houston on Sunday.
After being arrested, Thomas came clean, according to Kesc Smith, a Houston PD spokesman:
"She was very matter-of-fact in terms of what she stated she had done."
Things started to get suspicious when one of Thomas' acquaintances noticed her throwing trash into a vacant lot across the street — and when the person asked what she was doing, the mom apparently said she needed to move out of her home "immediately."
From there, the person helped Thomas pack her things, until realizing the children were nowhere to be found. When Thomas was confronted about it, she immediately came clean, and the police were called shortly thereafter.
The children were identified as RayRay (5), and Kayana (7). Thomas also has a 12-year-old son, but he was not home at the time.
Neighbor Shirley Baines reported never having problems with Thomas, and she told reporters after the fact:
"She made sure she kept the kids clean. She takes care of them. She goes to the store… to me, she was like, a real nice person. They are good kids. They don't play with nobody. I mean, why would someone do their kids like that? I mean why? They are innocent!"
And another woman, reportedly the aunt of the two young victims, was distraught over the tragedy, telling reporters:
"How am I going to tell my brother about his kids? While you were there, how did you feel drowning your kids? You felt something, you felt some kind of guilt, something told you this is not right, but you kept doing it?"
According to that reported aunt, the father of the children — Thomas' partner — is currently serving time in jail.