New photos show Britney Spears grabbing a lighter and pack of Marlboros from the hands of her curious young son Sean Preston.

The photos, snapped this weekend by photo agency X17, also show a slimmed-down Spears smoking in a red bikini outside her Beverly Hills home in front of Sean Preston, who is almost 3.

Last week, Spears and her ex-husband Kevin Federline reached a settlement that reportedly allows Federline to retain sole custody of Sean Preston and Jayden James, who is almost 2, with Spears having regular monitored visitation.

Her visitation can increase as long as she continues to be under the conservatorship of her father James Spears, according to reports.

The singer has been criticized for several instances of poor parenting, including driving a car with no seat belt and Sean Preston on her lap.

Click here to see pictures from X17