Erika Jisela Miranda-Alvarez is accused of kidnapping Flores' 6-week-old child. She has also been charged with capital murder in Flores' death.
"I don't think she has any mental issues," Jenny Lopez said. "I just think she really wanted a baby because she lost her baby, she just really wanted a baby."
Lopez and Flores shared an apartment when she moved to Houston from Honduras.
"Carolina was a good woman," Lopez added. "(She) came from a struggle, came from the poor. Wanted to be something, wanted to be someone."
RELATED: Woman accused of stealing baby to cover up miscarriage, police say
Police say Alvarez was friends with Flores' brother and had been a friend of the family for several years.
Investigators say Alvarez was due to have a baby in January when she suffered a miscarriage.
Shamali Flores: A timeline in the baby's disappearance
Police believe she continued to fake her pregnancy for family members and her boyfriend.
For Flores' family, an arrest is a step in the right direction.
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