An hour prior to Monica taking her sons anal virginity, Gabrielle was just locking up at the store. She had texted her sister to ask how the date was going but had yet to get a response. Knowing that he sister was usually prompt with her responses, she figured the date had gone either really well, or not so great and was already over. On a whim, she decided to drive by her sister's place on her way home and see if she was around. Being pretty close with her, she welcomed herself in when she noticed her car, parked alone, in the driveway. Assuming that the date went south, she guessed that she could enjoy a glass of wine and catch up with her sister and nephew.
Upon entering the house, Gabrielle found the first floor dark. She headed to the stairwell, expecting them to be in their respective rooms when she heard muffled, but distinct sounds of moaning.
"I can't believe she brought a guy home, Jeff must be with his dad this weekend." Gabrielle thought.
She was curious though, and not having the most traditional boundaries, she wandered up the stairs to see if she could catch a glimpse of the new guy.
Gabrielle crept to her sisters' room and peaked around the doorframe, which was cracked ever so slightly. She saw Monica from behind, she recognized the lingerie she was wearing from the store earlier that day, but in addition to that was a black harness that Gabrielle recognized as likely being attached to a dildo. Gabrielle felt flushed as she never expected her sister to be so bold as to peg a man, let alone so early in a relationship.
"This guy must be pretty kinky." she thought. Gabrielle starred in awe as she watched her sister pump in and out of this guy's ass. She found herself being extremely turned on by the scene unfolding in front of her.
Gabrielle reached down the front of her pants and began to gently rub her clit. Anxious to see who this guy was she peaked further around the door frame. To no avail, all she could see was his hands, pulling his legs up, allowing her sister to slide into his ass. She could also see his enormous cock, which Monica was stroking as she pumped into him. Gabrielle's mouth watered at the site of the veiny monster. "I'd do anything a guy wanted if he was packing that tool." She thought.
"Ohh fuck baby, take my cock!" She heard her sister moaned as she slowly pumped in and out while stroking his cock in sync. Gabrielle could tell she was getting off on this and it turned her on immensely. She moved to fingers below her clit and began to finger her soaking pussy while she watched. Gabrielle couldn't believe how wet she was, it crossed her mind that the noise from her wet pussy might alert the couple of her presence and the thought of being caught excited her even more. She inched further into the doorframe trying to see more as she moved her free hand up her shirt and began pinching her nipple.
Gabrielle's universe was suddenly shattered when she heard the mystery man yell in a very familiar voice "ohhh mom, I'm going to cum!".
The sudden and unexpected realization that Gabrielle was watching her sister fuck her own son, and that her son had a baseball bat for a cock made her cum instantly. She quickly pulled her hand from her shirt and bit the heel of her palm to keep from making any noise. She backed away from the door frame and continued to finger her sopping cunt as she continued to cum. She could hear her nephew and sister cumming just feet away from her and it only heightened her pleasure.
It took Gabrielle a few moments to gather her thoughts after she came down from her orgasm. Her first instinct was to run, but the hesitation allowed her to focus on how turned on she still was.
Gabrielle made a bold decision, took a deep breath and walked in her sister's bedroom to see her sister wearing cum covered lingerie that she had gifted her earlier this afternoon along with a pink rubber dildo. Her nephew was lying next to her with his huge cock deflating in post coital bliss. They both had their eyes closed.
Gabrielle crept to the foot of the bed, took her shirt and bra off and cleared her throat. Monica and Jeff both jumped with terrified looks on their face when they saw Gabrielle standing there topless.
"You two look like you're having fun." She grinned. "I hope you don't mind if I join, I mean I won't tell if you won't."
With that Gabrielle crawled onto the bed.
"Gabrielle, what the hell are you doing!?!?" Monica shouted.
"I should be asking you, but after seeing this cock, I can't blame you." Gabrielle said as she reached up and grabbed the base of her nephews swollen dick.
Jeff was frozen with fear, but his body reacted to the sexy naked women grabbing his young cock and it began to harden.
"This is so wrong." Monica said, but he eyes were fixed to Gabrielle's hand as it began to move up and down her son's cock.
"Monica, I need this probably more than you do!" Gabrielle said and inched closer to her nephews' cock. She leaned forward and took the head in her mouth while looking directly into her sisters' eyes. Gabrielle took Jeff's cock deep into her mouth, making herself gag and drool around his pulsing member. With her free hand, Gabrielle pulled her pants off and began rubbing her wet pussy.
