A 22-year-old mother from Jacksonville, Florida, has pleaded guilty to second-degree murder for shaking her 3-month-old son to death after his crying interrupted her FarmVille game.

The mother, Alexandra V. Tobias, was arrested in January and declared her plea on Wednesday before Circuit Judge Adrian G. Soud, The Florida Times-Union reports.

She told investigators that she shook the baby, smoked a cigarette "to compose herself," and proceeded to shake him again. The baby may have hit his head during one of the two shakings, she said.

FarmVille, named one of the "worst inventions" in recent decades by Time magazine, has more than 60 million members, most of whom access the game through Facebook. Some players have found it so addicting that they've lost their jobs and racked up debts north of $1,000.

Needless to say, it is Ms. Tobias — and not the game itself — that is responsible for the death of her 3-month-old son. This is not the first time that a virtual game has led to murder; in 2009, 28-year-old Joseph Johnson of Chicago was charged with first-degree murder after allegedly shooting his companion in the head while playing an Xbox game.