The First Part Of The Bet

“Well the first thing I want you to do is go and change into something sexy. Then I want you to come back in here and strip for me and give me a lapdance.” Zack said to his sister.

Heather smiled and went into her room and changed into one of the sexiest outfits that she had and was back in Zack's room within five minutes. Zack liked what he saw when his sister came back into the room dressed in a dark blue teddy with a garter belt that was clipped onto her dark stockings that she was wearing. The dark blue thong that she was wearing finished off the outfit.

“Wow. You didn’t pull out any stops with this outfit.” Zack said with a smile.

“Always the best for my brother.” Heather said with a wink.

She went over to the stereo that Zack had in his room and turned it on and put one of her cds in and turned it to a song that would work well for stripping and then started to do just that. She started out unbuckling the garter belt so that she could work the stockings off next. She started with her left leg and lowered the stocking slowly and when she finally had it off she threw it at Zack. She did the same thing with her right leg. The next thing she did was lose the garter belt which didn’t take long as she slipped it sexily over her hips and it fell to the floor.

Now she only had her teddy and her thong left. Since Heather knew that Zack was a tits man, she decided to give the guy what he wanted. She grabbed the hem of the bottom of the teddy and started to lift it slowly and seductively until she finally lifted it over her head and her tits were in full view of her brother and just like normal, he was pretty much drooling all over himself.

“Like what you see dear brother?” Heather asked.

“Hey, you do the same thing when you see my dick.” Zack said.

Heather couldn’t argue with that because she knew that it was true. Her brother was hung well. She was now doing a seductive dance in front of her brother with only her dark blue thong still on. She started to twerk not too far away from her and then she reached for the waistband of her thong and started to pull it down. Heather then turned around so that Zack could see her tits and her bald pussy right there in front of him.

“God, you look awesome naked.” Zack said almost as if he was in a daze.

“I know I do, brother.” Heather said and then she walked forward swaying her hips until she was right in front of Zack.

When she was in reach of Zack’s lap, she turned around and sat down on his lap with her back toward him and started to grind against his sizable cock. She could feel it starting to get hard instantly, but she wasn’t done having fun with him yet, and the next song had just started so he had a while to go yet.

After a while, Heather decided to turn around so that she was facing her brother now and Zack took the opportunity to lean forward and take one of Heather’s nipples into his mouth. Heather slapped him on the back of the head and Zack looked at her in surprise, wondering why she had done that.

“Did I say that you could touch?” Heather asked with a raised eyebrow.

“You don’t normally have a problem with it so I thought why not.” Zack said.

“You want a real deal here then you know you can’t touch unless the girl gives you permission.” Heather said and Zack pouted at this.

Heather just shook her head and said, “You know I can’t resist your pout. Do what you want.”

Zack leaned back forward and took her left nipple in his mouth and started to suck and lick on it. Heather continued to grind and Zack’s cock and could feel it really getting hard now and she was wishing that she could have it inside of her, but that wasn’t part of the plan right now, so she would just have to wait for her time.

Zack started moaning as Heather was now dry humping him so hard that he thought that he would probably cum if she didn’t stop soon. He had to hold on. This was not part of the plan, and he didn’t want to nut in his pants. The song still had a while to go, so if he could hold off until then he could probably get some of his stamina back for what he had planned next.

Zack had finally finished sucking on both of Heather’s tits and he pulled back to look at his sister and saw that she was in a state of **** bliss just like he was. She was about to cum, because Zack knew all of the signs and he was seeing most of them now.

“You are about to cum, aren’t you sis. Cum for me.” Zack said and Heather did just that as she came all over Zack’s pants and leaned forward into her brother so that she could catch her breath.

This worked out well for Zack because it allowed him time to recover. He wasn’t going to let anything else happen until the end of the song, which wasn’t too far away, but it was long enough for him to get some of his strength back. About a minute later, the song ended and Zack knew that once Heather recovered from her orgasm it would be time for the next part of his plan.

Heather finally came back to her senses and realized something right away. She hadn’t made Zack cum and that was what she was trying to do all along. Heather was about to say something to Zack about this, but then she saw the look on his face and knew that he was not done yet.

“This was obviously part of your plan. What do I have to do now?” Heather asked.

“Smart girl. You know you aren’t done yet. I want you to suck my cock until I cum in your mouth and you swallow all of it.” Zack said.

“Your wish is my command, dear brother.” Heather said as she helped her brother get rid of his pants and then wasted no time in taking Zack’s cock in her hand and began to stroke it.

Heather then took the first half of Zack’s cock into her mouth and started to bob her head up and down and Zack was loving every minute of it. Heather kept eye contact with Zack the whole time. Zack ran his hand through Heather’s hair and then started to push her head down a bit further. It didn’t take long for Heather to know what Zack wanted, so she went with it, and the next thing she knew, her nose was laying against Zack’s abs and her chin was resting on his nut sack.

“God! I love it when you take me into your throat!” Zack moaned.

Heather kept Zack’s dick in her throat for as long as she could until he needed to breath and she pulled back then, gasping for air. Once she got her breath back, she went back to work taking his cock into her throat on every stroke now. She was moving at a slow pace so that she wouldn’t have a problem doing this with Zack’s large cock.

Zack was now moaning a lot and he knew that if Heather kept this up he wouldn’t last long at all. That was okay though because that was exactly what he was wanting anyway. Once he knew that there was no reason to hold back he didn’t even try anymore. He knew that it was a losing battle so he might as well go with it, so when he felt the signs that he was about to cum, he went with it and he was now shooting his cum down his sister’s throat and she was taking it like a champ.

“Oh God, Heather! I am cumming down your throat.” Zack moaned as he continued to cum into her mouth until he was finally done and he pulled out of her mouth.

“You are always so tasty, dear brother.” Heather said as she finished swallowing Zack’s cum and cleaning up what little had leaked out of her mouth.

“Glad I am up to your standards. So, I am going to lay down and rest for a bit. You can stay or leave. Whatever you want to do.” Zack said as he went over to his bed and laid down.

“I think I will join you.” Heather said as she laid down in front of her brother and they spooned for a while before they both fell asleep.

. . .

A couple of hours later the twins woke up and got up and got dressed. Heather knew that this wouldn’t be the last thing that she had to do to fulfill her bet to Zack, but she wasn’t going to go around and worry about what he was going to have her do next either.

“So, I have a good idea for your next part of the bet.” Zack said.

“I’m listening.” Heather said.

“I want you to set up a sleepover. It will be an underwear party. Meaning if you come to the sleepover you have to strip down to your underwear in order to enter the mansion.” Zack said.

“I think I can do that. Is there any reason for this bet in particular?” Heather asked.

“There might be a few of our friends that I would like to see in their underwear. It is a win win for me. I get to see all of the hot girls in the lingerie and you get to see some of the soccer players down to their underwear as well.” Zack said.

“Now that you say it like that, I think it is a great idea. You know, you mentioned some of the girls that you would like me to help you have sex with. I do think I can help you with Ash.” Heather said.

“You know me so well. I will make you a deal. If you can get Ashley to fuck me at the sleepover. I will give up the rest of this bet. If you can’t, you still have to do everything I say for the rest of the week.” Zack said.

“You have a deal. Is there any time that you would rather have this sleepover?” Heather asked.

“The sooner the better. If nothing else, I get to see all of our friends in their lingerie. But I am hoping that I get some pussy, other than Sharon.” Zack said.

“What is the deal with you two anyway? She doesn’t seem to have a problem with you sleeping with multiple women.” Heather said.

“I was honest with her from the beginning and she said she was fine with me sleeping with other women. I think in some weird way, it turns her on.” Zack said.

“Has she ever talked about becoming more serious?” Heather asked.

“Not yet, but I have a feeling that it will be coming soon. How do you not know this stuff? She is like your best friend after all.” Zack said.

“I don’t know. I guess she just doesn’t feel comfortable talking to me about this stuff since I am your sister.” Heather said.

“That makes sense I guess. So, I would like to have the sleepover as soon as possible, that way we know whether you get an early release from the bet or whether you have to complete the week.” Zack said.

“It will be happening two days from now. Invite your soccer friends. I need some eye candy of my own you know.” Heather said.

“I will make sure you have your fill of guys to look at. Don't worry about that.” Zack said as they both went their separate ways for a while, with Heather planning the sleepover and Zack not knowing whether he wanted Heather to succeed in the bet so that he would have the chance to fuck his best friends or hoping she failed so that he couldn’t get her to do whatever he wanted her too for the rest of the week.