Ethan's been avoiding his stepsister since their parents got married, but when she shows up at his apartment uninvited, he realizes her absence has only made his heart grow fonder....

Rule number one - It's only supposed to last for a week.... Ethan is a cocky, arrogant jerk. He's always been that way. I'll never understand why girls trip over themselves just to be with him. Don't they realize he's going to ditch them in a week?

This is bad. Very bad. He's rubbing off on me. Resident bad boy Ethan Colton is turning me into an irresponsible bad girl. Rule number two: When I tell you to come here, you come here. It's still an order, still practically growling at me, commanding me to obey him, but it's more, too. It's fun and flirty, a little playful. I can see why girls fall for him, can see why his devious smirk melts their resistance, because it's doing the same to me.

I was never supposed to fall in love with my stepbrother. I never intended to. It just sort of happened. Rule number four - You can change your mind, too, Ethan. We can't. We're done. This girl lives in the same house as me. Her bedroom is just down the hall. It barely takes 20 seconds to go from her room to mine, and yet it's an impossible distance now. She might as well be on the sun.

How can something so wrong be so perfect at the same time? Rule number five - I'm going to show you some things that you'll never forget. It's wrong. Not just this, but everything. I knew it was wrong, but I thought I could get away with it. Why, though? I'm not like this. I'm good. I'm the good girl, the girl with perfect grades, the girl who does everything right, prim and proper. I don't cause trouble, I don't get into trouble, I don't....

I thought I was a good girl, but then why do I love hearing all of the naughty things he says he wants to do to me? Rule number three: You can change your mind, Ashley. Not just now. Whenever. I could tell Ethan that the only thing I'll regret about this is that we only have a week together. Except I can never tell him that. I need to stop. I need to understand that this is a temporary situation, and that I'll never have it ever again, because no matter what, it won't work out, whether I want it to or not.

He was my dad's best friend - and my first crush. Falling for him was bad. Flirting with him and trying to get in his pants the night of my 21st birthday party was definitely worse. But can you blame me? I hadn't seen the guy in years and he comes back looking hotter than ever. Our fling shouldn't have even begun but now that it has, I don't want it to stop. I'm crazy for this guy - and he's obsessed with me. Too bad my father will kill him if he finds out. So we can't tell him. We just have to keep it secret. Right? That might have worked...until he got me pregnant.

Rule # 12: You can tease me, Ethan, and we can play, but you can't be mean to me. I need to know that there's more, that this isn't wrong, that you feel the same way I feel.... I never wanted to hide this from you, Dad. It wasn't about that. It wasn't that I was ashamed or thought I was doing anything wrong, but I didn't think you'd understand, and I wanted to be with Ashley. I want to keep being with her, and whenever I thought about telling you and then thought about you getting mad about it...well, yeah, that's it.

We all have our strengths and weakness. We're all good at something and bad at something else. This is why we need each other. This is why it makes sense for Ethan and me to be together. I'm the good girl, the careful, cautious one who thinks before she acts. Ethan is the bad boy, the risk taker, the person who jumps into action regardless of the consequences. Sometimes you can't wait to think before you act, though. Sometimes you can't be careful or cautious.

Well, I was failing to write a sex scene. As an author of more than 50 smut books, I was struggling to do what I did best. So, for fun, I asked one of my best online friends for some help.

Boyce: I was a broken man trying to heal. She was my daughter’s best friend. Strictly off limits...until that one night, when she looked...all grown up. Vivian: The day I lost my parents changed everything. Thankfully, I found a soft place to land. But when I grew up and moved away, I couldn’t get him out of my head. Now, I’m all grown up, he’s single, and we’re both willing.

Keeping up a perfect good-girl image is hard for Allie Hall, especially when her stepbrother is the notorious Jace Harbor. With her head always buried in her books and the haunting memories of her father’s death, she wants nothing more than to end senior year on a high note, so she can get out of her shitty town. Jace Harbor can’t wait for graduation. He’s tired of the liars, cheaters, and football groupies at Redwood Academy. When his father forces him to spend a week alone with Allie, he remembers that part of Redwood that isn’t all that bad.

Why am I dating this girl? I'm supposed to be the one teasing her and getting what I want. It's not supposed to be the other way around. I'll give her what she wants when I'm good and ready to do it. That's how this used to work. She's changed the rules completely.

When Ashton moved to London, it broke my heart. I was only fourteen, but I was in love. I haven't seen him in four years. But now my father is getting married, and he's back. My feelings haven't changed, but I have. I'm not a scrawny little girl anymore. I have thick hips and curves. And once my father's best friend sees them, well, let's just say he becomes more caveman than best man. He can't take his eyes off me during the ceremony. He can't keep his hands off me during dinner. And every chance he gets, he's pulling me into storage closets and kitchens and alleys to..."celebrate".

When my stepbrother, Elec, came to live with us my senior year, I wasn’t prepared for how much of a jerk he’d be. I hated that he took it out on me because he didn’t want to be here. I hated that he brought girls from our high school back to his room. But what I hated the most was the unwanted way my body reacted to him. At first, I thought all he had going for him were his rock-hard tattooed abs and chiseled face. But things started changing between us, and it all came to a head one night.