Nico Robin 2 years later Dressrosa and Issei Hyoudou.
Nico Robin is naked, lying on the side (spoon position) and Issei is naked too, behind her.
He lifts a tiny one off Robin's leg and has his penis enter Robin's vagina.
Nico Robin smiles with pleasure, his head turned a little while looking at Issei.
He smiles in contentment.
Next to the window, we see Sanji looking at the scene, disgusted and jealous.
Title: Issei in paradise.