Go up to the mermaid and knock her out

From Create Your Own Story

She is out cold with one swift hit to the head you bring her home and awaken her, explaining she is your sex slave. "No! Let me go! Please! No!" She screams at you to let her go.

Slap the little sexy slut

get your cock up in her pussy

get your cock up in her ass

make her give you a blow job