Britney Spears goes on a private Harbor Cruise in Marina Del Rey on Thursday with her cousin Allie and two sons — Sean Preston, 20 months, and Jayden James, 8 months. (Brit still hides Jayden underneath a blanket.)

Brit Brit enjoyed cocktails in the yacht’s cabin and sunbathed on the deck.

During the hour-long high-seas pleasure cruise, the 25-year-old pop princess covered up her off newly toned figure and green bikini with a hoodie and pink sarong.

12+ pictures inside of Britney’s cruise with the kids…