According to Balles, Taylor and her mom had a strained relationship
Credit: Source: Facebook

Taylor Sheats, the 22-year-old Texan fatally shot along with her younger sister by their mother last week, had a strained relationship with her mom, Taylor’s former boss tells PEOPLE.

Elizabeth Balles, a teacher at Kids R Kids, a Katy, Texas, daycare center, supervised Taylor for six months in 2015 when she co-taught Balles’s class of three- and four-year-old children. Balles tells PEOPLE Taylor would sometimes talk about her relationship with her parents, Christy and Jason Sheats, as well as their relationship with each other.

“Her mom’s relationship with her was kind of rocky but her [and her dads] was rock solid,” Balles says.

Balles remembers Taylor talking about her parents’ shaky relationship with each other.

“She told me that if it weren’t for the girls, [husband Jason] would have been gone,” Balles tells PEOPLE.

On Wednesday, Nehls told PEOPLE that the day Christy opened fire on her family, Jason told her he would be filing for divorce. Christy had a history of mental illness, according to authorities, who said they came to Sheats’s house three times for suicide attempts.

Jason was not shot. According to Nehls, Jason told authorities he believed his wife did not shoot him because she wanted him to suffer from his loss.

Balles tells PEOPLE the love between Taylor, her sister Madison, 17, and Jason was palpable: “He was there for the girls. [Taylor] adored her father and he adored her.”

On the day she died, Taylor had an argument with Christy, Fort Bend County Sheriff Troy Nehls told PEOPLE. Nehls said Christy wanted to ground Taylor and prevent her from seeing her fianc , Juan Sebastian Lugo, though he is not sure if that was the cause of the argument.

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“[Taylor and Juan] had a wonderful relationship. She had some issues with anxiety and even at her lowest point [Juan] was there and he stepped up,” Balles says.

Balles never met Juan, she said, but Taylor hung his picture on the classroom wall. “He really took care of her – he treated her like a queen.”

The two were set to marry days after Taylor’s death, according to family.

Balles tells PEOPLE during her time at Kids R Kids, Taylor never missed a day of work.

“She just fit right on in,” Balles says, adding that Taylor taught the children sign language, Spanish and art. “I just remember thinking, ‘Man, she’s amazing!'”

The funeral for Taylor and Madison will be held Saturday at 2 p.m. in Decatur, Alabama, a representative for the Shelton Funeral Home tells PEOPLE.

The services for Christy will not be with her daughters, Shelton representatives tells PEOPLE.