Go see Diane^`

By the time you reach Steve's house, your pulse is pounding in your head. So many horny and lustful thoughts of being cuckqueaned by your sister have been tumbling through your head ever since you left the hotel, but now that you're here you have no idea what you actually want to say to her. A part of you is hoping that she isn't even here, leaving you **** but to come to your senses and go back to your hotel room for a much-needed nap. That more rational part of your psyche sighs in despair though as you see Diane walk out the door with a box full of her things and carries them over to the open trunk of a recent model SUV with rental tags in the driveway. She has a satisfied smile on her face and an extra spring in her step. In her wake, you see Steve leaning out the open door wearing a bathrobe and a smirk that you often see on men right after they've gotten laid. You know you should just go back to the hotel and wait until you're thinking more rationally, but you've already committed to this course of action and simply have to see it through.

Taking a deep breath, you start walking purposefully up the driveway. Steve spots you first. You see his eyes widen, and he quickly disappears inside the house. No doubt he wasn't expecting you to show up here of all places, and he certainly doesn't want to give anything away about the wild night you two shared two nights ago to your sister.

"Hey, Sis!" you shout as you approach her.

Diane looks up, surprised when she sees your face. "Suzy! What are you doing here? Look, this really isn't the best time. Steve and I were just, um..."

"Yeah, I can see, but tell me who did you sleep with on Thursday night?" you interrupt to ask her.

"Shit," she whispers. Understanding dawns in her eyes. She looks away and bites her lip. Her cheeks flush with embarrassment. She really did it! Any lingering doubt vanishes at the sight of that guilty expression on her face.

"Look, Sis, I'm so sorry! I've been dealing with the divorce, and Dave has been so nice to me lately. I mean, you did encourage us to get to know each other better. Things just sort-of... happened. Oh, Suzy, you must be furious with me! I won't do it again, I promise!" she says apologetically. Her eyes have trouble meeting your gaze and keep darting down to her fidgeting fingers. Her right thumb rubs nervously against the indent around her left ring finger where her wedding ring used to be.

"Actually, I'm not," you say matter-of-factly.

"You're not?" she says looking puzzled.

"No, I'm really not. I don't understand it. I should be a raging bitch to you right now, but instead I'm just... well... thinking of Dave fucking you behind my back just makes me so goddamn horny." you finally admit out loud. Diane is speechless. The stunned expression on her face only heightens your anxiety as you wait for her to find her words.

"Really? Wow! So... you're not mad? That's a relief, but... horny? I guess that shouldn't really be a surprise though. I mean, I've seen the kind of porn you watch and the erotica you read. Wait, does he know that you know about his affairs."

"No, he has no idea that I... hold up, did you say affair-s?" you say with emphasis on the 's'.

"Shit," she whispers to herself again, biting her lip and looking away just as before.

"Diane, has Dave been cheating on me the whole time?" you ask while trying to ignore the tingle between your thighs. You actually feel an odd respect for Dave for keeping his side-action hidden from you for so long.

"Hey, I'm not a snitch." she says holding up her hands defensively. "I haven't told him any of your dirty little secrets, so please don't ask me to tell you his. Yes, I slept with Dave; and yes, it was good for me. In fact, it was the best sex I've had in a long time, and I would do it again in a heartbeat! Does that make me a filthy cheater? Absolutely it does, but you should know better than anyone how important it is for a cheater to have discretion."

"Okay, okay, fine! Keep your secrets, just ask me first before you sleep with my husband again, okay?"

"Oh no," she says as she shakes her head with an impish grin. "I'll sleep with Dave whenever I damn well please."

"Excuse me?" you ask incredulously. Her sudden shift in tone catches you off guard.

"Oh c'mon, Sis! You know now that you're not keeping his magnificent cock all to yourself, so there's no sense in making me ask you for permission. Besides, you weren't going to ask me before you slept with Steve, were you?" she says is a cocked eyebrow.

Your face goes white. "How did you..?"

"Steve has always been terrible at keeping secrets. Yes, I knew about that Christmas in Vermont and I know about Thursday night. Look, I'm done with that asshole, so you can stuff yourself with his oversized dick to your heart's content for all I care. That's the only redeeming quality he has left. Just know that I'll be keeping your side of the bed warm right next to Dave while you do it," she says before adding, "... or on top of Dave... or underneath Dave..."

"Okay! Fine." is all you can manage to say.

"Good. Now, if you'll excuse me, I have to finish packing up my things." She flashes you a smug grin.

"Wait!" you call out as she turns to walk back up to the door.

"Yeah, Sis?" she stops and turns back to you.

"If you're so done with Steve, then why were you two having sex just now?" you ask. She takes a moment to consider her answer carefully.

"In case I need the child support." She walks back up to the door and disappears inside the house before you realize what she means by that.