Is Celebrity Rehab star Kari Ann Peniche exposing her baby to meth? That's the shocking claim made by Peniche's husband as the couple dukes it out in a custody battle over their 10-month-old son.

Peniche's husband, Justin Williams, filed papers in Los Angeles County Superior Court alleging the couple's son tested positive for meth after he took the infant for a hair follicle drug test, according to TMZ.

In the court papers, Williams claimed the 10-month old has a habit of sucking on Kari Ann's hair and clothes and I became concerned that he could be affected by drug residue.

Williams is using the allegations to suggest he receive sole custody of his and Peniche's child, claiming the 10-month-old is in danger while under the Celebrity Rehab star's care.

I do not want him to continue to be exposed to smoke for meth or to accidentally ingest illegal drugs while with Kari Ann, Peniche's estranged husband told TMZ.

Aside from sole custody, Williams is also seeking to prevent Peniche from having unsupervised contact with her son and to submit to weekly drug tests, TMZ reported. If Peniche tests positive for drugs, Williams wants the visits to be rescinded.

Peniche, a former beauty queen who had a short-lived engagement to pop star Aaron Carter, appeared on VH1's Celebrity Rehab With Dr. Drew in 2008 and on an episode of Celebrity Rehab Presents: Sober House in 2010.

She tested positive for meth on the 2010 show and was seen with the synthetic drug in the 2008 Celebrity Rehab. Peniche was also in the documentary Sex Rehab with Dr. Drew, where she admitted to having hundreds of sex partners and opened up about having been sexually abused.