Two California teenagers gave drugged milkshakes to one of the teen's parents to bypass a 10 p.m. Internet cut-off time, police say.

The teens, a 15-year-old girl and a 16-year-old friend, volunteered to buy milkshakes for the parents. The Sacramento Bee reports the parents drank only about a quarter of the milkshakes because they tasted grainy. They fell asleep and woke up around 1 a.m., with hangover symptoms, but went back to sleep.