HOUSTON --A Pasadena woman accused of having sex with a 12-year-old boy is now behind bars. Brandi Fuller is being held in Galveston County Jail. The 30-year-old mother of six is charged with aggravated sexual assault of a child. She had been at large since she was charged. Details of her arrest have not yet been released. Pasadena police say the boy's mother recently came to them when she grew suspicious that her young son may have fathered a baby with a family friend more than twice his age. That is still unknown, but according to police, the boy, who is now 14, claims Fuller initiated the sexual relationship when he was 12. Investigators also say Fuller admitted to having sex with the boy only one time, but the boy claims it happened 10 or 12 times after the initial incident. According to the affidavit, a police investigator states Fuller admitted to having sex with the boy when she and the children were all sleeping in the same bed, but that he initiated it and that she didn't want to make a big scene, so the encounter took place. Brandi Fuller does have a 10-month-old child, according to her sister. But the sister told Eyewitness News that Fuller claims the baby's father is actually the alleged victim's older brother, and that she's willing to produce DNA to prove it.