You couldn't reject having sex with the captain, but you were going to get kicked off the ship if you said no. So with that, you start taking off the new clothes the tailor gave you, and become fully naked, as Crimson-Beard does the same thing. The captain wasn't the fattest member of the crew, but he was the tallest.
As both of you get in the hammock, you start by getting the captain's penis wet, while he licks your pussy in a 69 position. Once both of your privates were completely wet, you decide to put them together, but get worried if you get pregnant, so you offer the captain your butthole instead. It would normally hurt you if the captain shoved his dry privates into your butt, however you got it wet with your mouth, so it should be fine. As the captain penetrates you, you start to feel the pleasure of a woman.
'This feels so amazing,' You think. 'A man's privates in my hole. So this is what sex with a man feels like. Even though this is permanent, I don't want to change back at all." With that the captain came in you, causing you to pass out, and get some sleep.