(You are a Shadow. Pirated A.U. version on behalf of Sonic)
It all started on the day when the captain of a small ship found the named guest on the deck, who had been stealing supplies from them for a couple of weeks. It turned out to be a blue hedgehog, which the team kept tied up for several days before he joined them.
To the surprise of the captain, Sonic proved to be a good member of the team. He was agile, fast, and had his own fighting tactics, which they definitely needed, given his speed. A couple of months later, the blue hedgehog completely settled into the pirate team, found his place and vocation, becoming the "favorite" of the captain.
But something else has changed.. A couple of months later, he and the captain began a secret affair. It wasn't a relationship or love, they kissed, they could sleep together, but nothing more. They never talked about their feelings or even thought about it. Although recently Shadow stopped letting Sonic in at night, fearing that he would be caught, which blue was clearly not happy about.
It's unclear how long this went on, it's just that at some point they started using each other as a "stress relief toy." And yet they both liked it, but the captain became more and more worried that one day someone from the team would find out about it, which made him less and less likely to allow himself such games with Sonic, while Sonic himself seemed to be dismissive of it.
It was already late in the evening. The ship is quiet, only the lapping of waves against the side and a few voices are heard. The light was on in the captain's cabin. There were two silhouettes on the bed. Sonic moaned plaintively, clinging to the captain, not losing attempts to persuade him to let him stay here for the night.. "Come on, we're turning this around for the hundredth time, no one even suspects!..."