The Horizon — Charlotte Stein

When Quade swoops in to save his archenemy, Sol, from bloodthirsty Cybers, he doesn't expect to find himself almost torn apart, terrified beyond imagining and even worse -- declaring his love for her. Now they're trapped on Sol's spaceship, both half-insane due to the Cybers pumping them full of some lust drug. If they can't get a hold of themselves quickly, they're going to be doing some pretty dirty things. But surprisingly, Sol doesn't seem to mind that newfound feelings are bursting out all over -- especially when said feelings pave the way for wild and constant sex with her former enemy.