Percy raised his head, even if it cost him every ounce of self control to do so. "Look at me." He waited until Cass could comply. "This is it, Cass. You're mine... and I'm yours." He probably could have picked a better time, like sometime when he wasn't running out of breath and his body wasn't screaming for release, but he pressed on.
"For better or worse, through health and sickness... all of that. No more hiding, no more lying. I will do anything - anything at all to make your life better, but you must give me the chance." He snapped his hips, ramming inside as he leaned down again, lips brushing against Cass. "Forever," he whispered before kissing Cass again.