The Pirate and the Beauty

Damian is a pirate.
He is 46 yrs old and wants to retire.
He needs a young mistress to spend with for the rest of his life and breed him sons.

Sharon is young girl and recently engaged.
She hates pirate.
After returning from her sister's baby delivery, her ship is attacked.
She becomes the mistress of the pirate captain.
And she is pregnant too.

What happens next?