A 50-year-old Davenport woman who police say bought pseudoephedrine for her son so he could make meth now is charged with exposing her grandchildren to the drugs.

Deanna Sue Dipple, who lived in the 1800 block of Calvin Street, was in the Scott County Jail Tuesday charged with possession of pseudoephedrine with the intent to deliver, conspiracy to manufacture methamphetamine and child endangerment, meth exposure, all felonies.

Her 31-year-old son, Michael A. Keck, also of the Calvin Street address, was arrested in August on felony meth manufacturing charges following a traffic stop and a follow-up police search of the Calvin Street home.

Keck admitted he cooks meth using the “one-pot” method, and police found fuel, coffee filters, acids, lye, a hydrochloric acid generator and several containers containing meth “sludge” in the home, an arrest affidavit states.

Police also found a 12-gauge shotgun and ammunition in Keck’s bedroom, the affidavit states.

At the time, Keck also was charged with a misdemeanor count of child endangerment. His affidavit states that his pregnant wife and three juvenile children were present during the search of his home.

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Dipple, who had her first appearance Tuesday in Scott County District Court, Davenport, after she was arrested Friday, also was watching the children during the search, according to her affidavit.

The three children were tested, and two of them tested positive for the presence of methamphetamine in their system, resulting in the felony child endangerment charge against Dipple, her affidavit states.

The Iowa Department of Human Services was notified about the drug tests on the children, the affidavit states.

Racheal Ann Keck, the children’s 28-year-old mother, is charged with controlled substance violation, possession of pseudoephedrine, possession of lithium and conspiracy, all felonies, as well as misdemeanor child endangerment.