It was Sanji's birthday on March 2, so you and the Straw Hats were making preparations to give Sanji a happy birthday while he was sleeping, until you started arguing about who would be Sanji's 'gift', so since you weren't aware of anything, they wrapped you in red ropes as a gift... they would use you as a gift for Sanji, and it was hell having to be tied everywhere with tight ropes... it's like you were a statue.

When Sanji woke up peacefully, Nami interrupted at the door.

Nami: "Sanji, happy birthday!" Nami said before throwing you into the room, making you roll and lie face down, being tangled and unable to move, and that was where Nami left, leaving you as the gift for Sanji.