25

Mike immediately knew that he wanted to go. Definitely needed to get away from this house that had been corrupting his brain and making him defile his sisters. It was easy for them to go on vacation. After his parents had been killed, the 5 kids had received a large insurance payment from their parents' life insurance policies along with the money that they had saved while they still had their medical practice. Sarah had sought financial advice about what to do and they were now living off investments and still had very large chunk of the original sum they had inherited. Sarah could stretch a dollar farther than anyone else he knew.

They had rarely gone on vacation, usually because the twins were still in high school, or Beth was taking summer classes, or Danni had some other engagement to go to. This summer marked the first time they'd all been off at the same time. It seemed like a perfect time for vacation.

"I think that'd be a great idea," Mike said, after a few seconds of silence. "It'll get us away from here and some of us definitely need a little bit of relaxation," he said, drawing a laugh from his sisters.

"Where do you think we should go?" Emma asked, glancing at her brother. She still couldn't believe what she'd heard. The conversation faded out as she was lost in thought. Sarah and Mike were fooling around. They were her sister and brother! They were related! Why wasn't she more repulsed by the thought? It should have sent her to the bathroom and vomiting her guts out. She wasn't though. She couldn't figure out why at first. It was Mike and Sarah. The thought that they were at least having oral sex, maybe more, and they were related kept bouncing around in her head. It was shocking, but there were other feelings there too. What were they? She was as surprised as she was confused.

"Cabo san Lucas maybe?" Sarah asked.

"South Padre," Beth suggested.

She'd always been close to her brother, they were twins for fuck's sake, but she'd never have thought that he'd be doing something like that with Sarah. She knew her sister well, but not as well as she knew Mike. It had to be her idea. There wasn't any other explanation. Mike must have told her about being caught in the shower and saying Danni's name out in the heat of passion. She hadn't thought any worse of her brother for what had happened, but had been reveling in the fun of tormenting him, knowing that he was agonizing over the event.

Sarah had been so vulgar, though. She'd never heard her say such things, telling her brother that she'd fuck him and wanted his cum. It wasn't her business, why couldn't she get it out of her head? Who cares if he was fucking his own sister, they were both consenting adults. Sure, it wasn't legal, but who were they really hurting? She found herself drifting over to this other unexplained feeling that began to overwhelm the others that were surging through her, as she brought herself back to the conversation.

"I like the Grand Caymans idea, but it's more expensive than the others would be. I'd suggest a cruise, but you have to book those in advance." Mike was rambling.

Emma glanced over at her brother. She knew he had to be bursting with testosterone and other hormones that saturated his manly prime. She certainly wasn't making it easy on him. She absolutely delighted in taunting her brother. She knew perfectly well what a nice ass she had, and precisely why her brother loved to go running with her. It even excited her that he found her attractive. It was her twin and she was closer to him than anyone else in the world. She could see why Sarah would be so excited and into being intimate with him, even wanting him.

Sex with him would be so much fun. She was only guessing, being a virgin, of course. She'd have to give him that, but he'd probably know to be gentle with her. 'This is Mike, your twin you dummy! What the fuck are you thinking about? Giving your brother your virginity?' she asked, thinking quietly to herself. She suddenly realized the unexplained feelings she was having. Jealousy. She couldn't believe it! She was jealous!

Sarah was being intimate with her twin and she was being left out. She began to realize that it was because she and Mike were so close. It felt like if someone in their family were to be intimate, it would be those two. They were so close it seemed like the next logical step.

She shook her head, drawing a curious gaze from Sarah.

This was Mike she was getting jealous over, not some guy at school. This was so wrong. Why did she feel so strongly about it? It felt like someone had opened a flood gate and this wave of emotion had poured out. She'd never felt anything so strongly before. All through high school and in her first year of college, she'd never been remotely interested in anyone, boys or girls. Now someone had turned on these feelings and she was finding herself wanting to express the love she held for him physically, yes fuck him, sisters be damned.

She'd never felt like this, and never felt this intensely, about anything, even sports, which were her favorite pastime. She was the only person that watched Sports Center besides Mike and usually more than him. She suddenly realized that she actually was going to try and give herself to her brother. She'd have to broach the subject with one of them.

Sarah, she realized suddenly, she'd be much easier to talk to about what was going on and the feelings she was having. Suddenly she was very envious of her older sister and suddenly couldn't wait to get her alone to talk.

"Emma? How does a trip down to the Cayman Islands sound?" Sarah asked, looking curiously at her sister.

"Wonderful," she said, smiling genuinely at her. She'd have to talk to her soon.

Sarah and Mike spent the next couple of hours at the computer, making flight arrangements and hotel reservations. Everything was set and they'd leave on Friday, spending a few days of luxury at a few small bungalows on the bay opening up into the Caribbean.

Mike looked down at the calendar, it was late Tuesday. He'd have to survive Sarah for a few more days before he could head to paradise and work out all of his demons.

They had supper that evening, Beth cooking again. She made some wonderful tasting oven-baked chicken dish. The meal passed quickly enough for Mike, and he was able to control his desires for his sisters for the time being, only allowing himself the occasional glance at Beth's ample and impressive cleavage. Emma and Sarah both noted his glances with a smile and didn't let on that they'd notice.

Mike was detailing some things they could do down in the Grand Caymans, having done some research on the island resort.

"I've got a few surprises planned when we get down there," he said with a wink. "A big one for you," he said looking at Beth.

"For me?" she asked, genuine surprise on her face. "Why me? What are you doing?"

"Nope," he shook his head. "Surprise."

She pouted at him and flashed her green eyes and long lashes. "Pleeeease."

He chuckled and shook his head. "I think you know how to get what you want just fine," he said laughing, adding, "Shy my ass." Laughter echoed around the room.