The rest of the cabin has some fun

Lisa had never had any lesbian fantasies in her life, but just watching the two sisters go at it, made her feel all hot and bothered. Ashley and Hannah continued to make out, and Hannah also made the first move to take things further as she placed her hand on Ashley's left breast. Ashley jumped back from Hannah with a sound of surprise "Hannah! We're only supposed to be kissing, you know the deal."

"Yeah sorry, I just got a little carried away, that's all." She said as neither of them realized Lisa was there hiding behind one of the sofas. "You do realize though, that if we're going to have a threesome with Zack, we're going to be doing more than kissing right?" Hannah informed her sister.

"Eww! We're siblings!"

"Yeah, so. What do you think Taylor and Zack are doing right now?"

"Lisa is keeping them busy." Ashley said uncertainly.

"They're busy alright. Don't you think it's pretty sad that I know you're friend more than you do? I could see it in Lisa's eyes as soon as she arrived, Taylor and Zack are probably fucking right now, I know it!"

"Oh my god. that's so hot!" Ashley said as her eyes widened in disbelief.

"If that's ok, why isn't this?" Hannah said as she played with Ashley's malleable breasts. Ashley moaned and made slight sounds of discomfort, but never tried to stop her older sister. Hannah saw through Ashley's front and continued to let her hands roam across her body, finding all her sister's sensitive spots.

"How are you so good at this?" Ashley moaned out after Hannah found a particularly sensitive spot.

"Lot's of practice with Taylor, to be honest." Hannah responded. Hannah quickly stripped out of her clothes standing in front of Ashley naked, and showing her fine backside to a hiding Lisa. Ashley made a short gasp at seeing her naked sister before her, this is why no one can get over her! Poor Peter, Ashley thought as her hands unconsciously inched up to the top button of her shirt. "Do it Ashley, I promise I'll show you what you've been missing out on. It may not be as good as Zack was for you, but then again, it could be even better." Hannah said as she sat on the sofa beside Ashley and helped her remove her clothes.

Lisa couldn't believe what she was seeing, Hannah and Ashley were practicing what they were going to do for Zack tomorrow during their time with him, when things had gotten out of hand, now Lisa was watching what could quickly turn into some really hot stuff. Hannah and Ashley were both naked now, and exploring each others bodies with their hands. They both lay down on the sofa again and started to make out once again while letting their hands reach places they hadn't touched on each other's bodies ever before. In Ashley's case, Hannah was touching her in places no woman had ever touched her before. Ashley's hands grabbed hold of Hannah's bountiful breasts, and rolled her nipples around her thumb causing Hannah to moan into her mouth appreciatively. Hannah responded by reaching down to cup Ashley's pussy, and plunge a finger into her depths causing Ashley to break the kiss and moan into the arm rest of the sofa. Ashley quickly reciprocated what Hannah was doing to her as her finger was soon in Hannah's pussy as well as they both tried to get the other off first.

All this visual stimulation was too much for Lisa, as she dropped her pajama shorts to the ground and started to finger herself to this wonderful show her friends were giving her unknowingly. Both sisters continued to make out while fingering each other as they both inched their way to the finish line. The progress was slow and arduous on both ends, and Hannah suggested eventually that they try to 69 to finish faster, which Ashley agreed to. Lisa watched as the girls on the sofas shifted over each other giggling all the while as they placed themselves in each other's care. Ashley placed her ass on Hannah face while Ashley's face was guided to Hannah's pussy. Lisa didn't know why, but she felt as if she wanted to be in there as well, instead she picked up the pace of her fingering, making sure not to cum until the others did as well. Lisa watched as the two young women on the sofa got to work eating each other out for a good minute until Hannah made them both stop for a bit. "Ash, you're awfully good at this! I propose a wager, whoever cums first, gets to finish off the other whatever way she wants. Deal?"

"Deal!" Ashley said as she pushed her ass back down on Hannah's face and got back to work herself. It didn't take long until Lisa could see the unmistakable shudders of an orgasm pass through one of them. "Wow, you came first! I thought it was going to be me, so how are you going to finish me?" Ashley said.

"Wait here, I'll be back."

"Sounds good." Ashley said as Hannah slunk her way to the other side of the room where her bags were. "You enjoying Lisa?" Ashley asked in the direction of the sofa Lisa was hiding behind. Lisa almost had a heart attack, how was she caught?

"Hmm, did you say something?" Hannah whispered as she came back towards Ashley with a hand behind her back.

"Nope, what do you have there?" Ashley asked as she saw Hannah hand hidden away. Hannah brought her hand in front of her to show Ashley a strap on. "That thing is huge Hannah!"

"Oh yeah, I get myself off to this thing every night since I broke up with Peter. 10 inches, veiny and thick, tell me how this compares to Zack's when you recover from what I'm about to do to you. Ok now, up on your hand and knees." Hannah said as she attached the Velcro to the dildo to wrap around her pelvic area. Ashley did as she was told and raised her ass so that her pussy and her rosebud were visible. Lisa couldn't see much anymore hiding behind the sofa, so she risked being caught and simply stood behind the sofa and watched the action progress. "Zack and Brandon are lucky guys Ash, you've got a fine ass." Hannah said as she spit on her hand and rubbed it over her large dildo turned strap on. "Brace yourself, I'm going fast and furious on you. Cover your mouth so we don't get caught." Hannah said as she rammed her fake cock into Ashley to the hilt, causing Ashley to moan out in a mixture of pain and pleasure, Lisa could tell that Ashley was close, and so could Hannah, as she started to thrust into her little sister.

"Someone having fun here?" Lisa heard being whispered into her ear. She whipped around in shock and embarrassment to see Heather holding a strap on of her own in front of her. Lisa just stared at the strap on, it wasn't as large or thick as the one currently delving into Ashley's depths, but it was a good enough size to get her off, and that's what she needed right now. Heather looked down at Lisa soaking pussy "didn't get off?" Lisa shook her head. "Why don't we remedy that for you?" Lisa felt a sense of joy and happiness of what Heather suggested, but also felt a little guilt because of what she had set Zack and Taylor up to do even though she knew Heather's feelings. All those worries disappeared as soon as Heather put on the strap on walked up behind Lisa, so that she could continue to watch the other couple, and placed her hand on Lisa's ass. "Brandon was a good diversion Lisa, who's in there with Zack?" She whispered into Lisa's ear as she plunged to the hilt into Lisa.