Dinner for two.

Beth stroked and sucked David's cock with gusto. It was wrong. It was cheating. I know it's wrong... but I just can't make myself care right now. David used his hands to help her get deep, and she choked a few times when the bulbous head jammed her throat, but she didn't let him slow down or stop.
"Fuck... that's amazing. You give such good head."
"Thanks..." she spit onto the floor and continued blowing him. It was strange to feel warm and fuzzy at the compliment, but she did. After a few minutes of work, David picked her up and carried her into Terry's office, where they stripped off what remained of their clothes before David laid back on the couch, crooking a finger.
"Bring your sweet ass over here and sit on my face, baby."

Beth gasped when David began to work her pussy with tongue and lips and struggle to bring herself down onto his cock for a sexy reciprocation. She didn't get many opportunities to 69 even before Brian lost interest in sex. She moaned on David's cock as he work magic in between her thighs, and she had to stop herself from suffocating him when her legs wanted to give out from the pleasure.
After she came, soaking his mouth and nose in her cum, she rolled of to let him up and presented against the arm of the couch. She spread her pussy lips with her fingers and looked back at David, who was stroking his cock.
"Permission to treat the witness as hostile...?" he smiled.
"Fuck, yes..." she smiled as well.

Beth closed her eyes and enjoyed the good dicking. Yes. she knew how wrong this all was. Somewhere in her brain, she was registering the hurt she would inflict on Brian if he found out. She idly wondered if she would able to face him when she got home. But the cock she was getting was too good, and her sexual frustration too great for her to care in the moment. "That's real good dick, baby..." she moaned softly as David made long full strokes, ramming home at the end of each one. Beth enjoyed the moment, resolving not to worry about consequences until later.
It didn't take long for them to finish with simultaneous spectacular orgasms. Beth didn't even care that David had cum inside her. She had trouble worrying about anything at all.
They laid together for a little while, not saying anything before each of them got up to visit the office bathroom and the dress. It was a little awkward and at a couple of points, it seemed as though each wanted to say something, but instead, they both simply blushed awkwardly at each other and murmured about needing to get home.
"Good night, David." Beth gave him a pack on the lips. "Thanks for the dick." That seemed like just the thing to break the tension, and David laughed nervously.
"Yeah... no problem."
Beth walked to her car, a little bewildered at herself for what she had done. On her way to her car, she got a call from Brian.

"Hey, baby!" she answered. Shit. I didn't call him.
"Hey, I just got home from the event. We wrapped early. Where are you? Kyle said you haven't been home yet."
"Wait... Kyle? Your brother? He's at the house?"
"Yeah... shit I guess I forgot to tell you. He got in today, so he's here."
"That's great." She grabbed the door handle of her car and climbed inside. "I'm sorry, I stayed late to help David. He needs to prep for a big case that's appearing in court on Monday." She turned the car over. "I thought I'd be home before you, so I guess I just forgot to text you."
"Oh, that's fine. I was just..."
"Aw... you were worried about me?" she grimaced. Fuck.
"Maybe..."
"Well, I'm in the car now, I'll see you guys in a bit."
"Ok, love you."
Beth berated herself silently for what she had done. "Love you too."

~

When Beth arrived at home, Brian was in shorts and a t-shirt, but he didn't appear to have showered yet, and when she hugged him he smelled faintly of cologne, perfume, and cigar smoke. She didn't mind too much though, and she hoped that he wasn't suspicious of her lingering hug and passionate kiss.

Kyle Jackson, Corporal, U.S. Army (Ret.) introduced himself. He was in jeans and a tight green t-shirt, and despite his extended hand, she gave him a hug instead. They enjoyed a late dinner, ordering pizza and drinking beer while Kyle and Beth got acquainted. Freshly discharged, he had taken a military transport from Damascus to Tel Aviv, and flown from Tel Aviv to JFK. After a quick 12 hour layover in Manhattan, during which Kyle had crashed with a friend in Brooklyn, he had gotten on a plane to LAX that had gotten in at around noon. He was jet lagged, though the 12 hours spent on the east coast helped a little bit. He would be looking for a job, and an apartment, but Brian was quick to assure him that he could stay with them for a while without a problem.
Beth began to notice Brian's eagerness to show himself as hospitable to his brother, and seemed to be bending over backward to make Kyle feel welcome and loved. Beth would have chalked it up to just being a proud big brother, if it hadn't been for the look that Kyle had given Brian after a particular bout of gushing praise and pride, which had caused Brian to subside into "yeah"'s and "so, anyway..."s. Something weird was going on there.
Eventually, jet lag caught up to Kyle. Beth and Brian headed upstairs to let him sleep.