The Heart pirates docked by a nearby island since it's been 4 weeks at sea, so ofc they decided to rest.

As everyone is playing around and eating food, your asleep in a hammock you set up a few minutes ago.

While you sleep you feel someone lay down beside you, you take a peek to see your captain; Trafalgar D. Water Law

“Zzz... Zzz... Zzz...” he has his arms around your waist, asleep. He must've wanted to take a nap with you.