It wasn't too long until the kiss became passionate, and Casey's immobility seemed to melt away. And it wasn't long after that that Casey broke away, reality hitting her like a brick to the stomach.
"Our parents are married!"
"And?"
"This shouldn't…we can't…it's not….they won't….step-brother!"
"A little incoherent are we? Was it my kissing expertise?"
"Derek! Be serious, for once. We're related! Doesn't that mean anything to you?"
"Not really," At her indignant gasp he elaborated. "I mean, think about it. We're not blood-related. And you know just as well as I do that we were never family."
"What would my mom say?"
"Why does she have to know?"
"Derek! I can't lie to my mom! Tha-"
"You're right. You suck at lying."
"That's not what I meant, and you know it."
"This wouldn't really be lying anyway. More of a don't-ask-don't-tell thing."
She sighed, reluctant at hiding things from her mother. Then, she looked at Derek and decided that it was too late to back out now. Casey smiled and Derek leaned down to kiss her again.
"No!" She shoved him away with both hands.
"What?"
"Our entire family is home! They could walk in at any moment!" To illustrate her point, Marti chose that time to barge into Casey's room and inform them that dinner was ready. After the purple princess had left to wash her hands, Derek turned to Casey and nodded.
"You're gonna need to get a lock on that door." And with that, he left for dinner, Casey following soon after.