You decide to chance it and stay.

You must have stood there for about five minutes before finally coming to a decision, aware that if you were to get caught you would end up in so much trouble, but unfortunately, at this particular moment being unable to pass up such an immensely erotic opportunity. Here you were in a house with two incredibly beautiful, slutty, fantasy women who were about to dress up like little schoolgirls and go to town on each others huge breasted bodies - when would you ever get an opportunity to see anything like this in real life again? When would anyone like you ever get to see something like this (especially involving their own mother)? No, it was just too freaking arousing a thought, and even if you sneaked upstairs and found the door to your mom's bedroom closed, simply being under the same roof as the two of them, listening to the sounds they made as they ate each other out would be worth the risk alone - the thought of being privy to something like this being about 100 times hotter and more exciting than simply sitting in front of a computer watching it all happen on a screen.

"I can't believe this is actually happening!" you grinned, rubbing at your hard penis and thinking what an amazing birthday this really has turned out to be, before pulling yourself up off the floor and rather cautiously making your way back out into the living room, every step causing a shiver of excitement to make its way up and down your spine.

Reaching the doorway that led out into the hall, feeling your heart racing faster than you'd ever felt it before, you slowly peered round the door to make sure that nobody was there (even though you had admittedly heard footsteps on the stairs moments before). Though the hallway was empty, the door to your mom's 'porno closet' had been left open, causing another surge of excitement as you began mentally picturing what the two of them would look like as slutty schoolgirls. Though you were pretty sure you had actually seen earlier pictorials of the real 'Amber' dressed as such, the idea of now seeing your mom like that, after having just spent the best part of a day with her acting like your normal, regular, run-of-the-mill mother (just as she always did around you) was almost overwhelming, and not something you had yet witnessed - although you had often wished you had. Having her come round to visit and then heading upstairs to your computer after she'd gone and watching things she'd previously recorded was one thing, but going from spending your birthday with a woman, who apart from her outward appearance, was almost in every way the exact same loving, caring mother you'd spent the last 18 years of your life with, to witnessing her transform into a slutty, lesbian porn star who was about to eat her best friends pussy out as if it was nothing was beyond any kind of comparable human emotion you could think of. It was just downright hot!

Shuffling quickly through the hallway then towards the stairs, you could hear their voices still giggling and laughing away above - slightly muffled perhaps, but still clear enough to assume that the door to your mother's bedroom (where you guessed they'd gone) had been left open. Pausing at the foot of the stairs, this realization opening up the possibility that you might indeed be rewarded with a peek of their incredible bodies wrapped around one another, performing all sorts of sexual acts, you decided to wait for a moment until you were sure they were actually 'getting down to it' - thinking of nothing worse right now than actually getting caught sneaking up there while their attention wasn't otherwise diverted. Not that the waiting was all bad, as after a couple minutes more of listening to them casually chatting away while obviously getting changed, the two of them suddenly began getting into character and actually reading excerpts from the script;

"This is all your fault, Summer!" your mother shouted, putting on a mock, angry teenage voice. "If you hadn't have been cheating on Bobby behind my back we never would have gotten stuck in detention!"

"Nuh-uh! You weren't even going out with Bobby at the time! He told me you two had broken up!"

"Yeah, well he's just a good for nothing liar! I'm glad we're through!"

"Me too! He was just a stupid, dumb jock! We shouldn't let a boy come between our friendship..." Pausing and letting out an chuckle over how ridiculous what she was saying was, Summer then said, "God, this dialogue just gets worse and worse, doesn't it?"

"I know. Who on earth are they getting to write this stuff, teenage boys?" your mom agreed, joining in on the laughter.

Although it was kind of cool to actually hear your mom pretending like she was some airhead schoolgirl, you were also rather glad that her opinion of the terrible plots and stories in porn movies was much the same as yours (even if she was in the biz), finding some of them to be truly laughable yourself and having always wondered if the actual actors in them felt the same way.

Returning to the script again a moment or two later, Summer then told your mother, "Lets just skip ahead to the sex part, okay?"

Doing just that, jumping further ahead in the plot, you stood there with baited breath, waiting anxiously for them to get to the good stuff (the mere mention of the 'sex part' driving your arousal even wilder) so that you could continue on up the stairs - rubbing at your crotch with one hand, while still balancing all of the gifts you had collected up from the kitchen in the other. "You really are my best friend, Summer, and I wouldn't want to change that for the world..." your mom began, her tone of voice becoming far softer and more **** (once again showing you what a good actress she really was), "it's just that sometimes...sometimes I wish we could be something more..."

"Really? Cause I feel the exact same way about you!"

"You do...Ooh, hang on a second!" your mom then said, interrupting herself (just as things were getting interesting) and announcing, "I forgot to grab the dildo from downstairs. I'll be right back."

Hearing this, as well as the accompanying sound of her feet scurrying across the upstairs carpet, you let out an internal little shriek and quickly began to look around for somewhere to hide - aware that she was now heading your way, and would be there any second. "Oh shit!"