Their mother was at work, and their father won a free day-trip. Since the girls were eighteen now, they decided to trust them with the house for the day. In their absence, the twins decided to throw a pool party (with plenty of onions of course), one that all of the kids on the block were invited to.
"You ready yet?" Susan asked impatiently.
Mary was standing next to her, her arms folded and looking at her feet. "I don't know...maybe just another minute."
"That's what you've been saying for the past four minutes! What's the big deal, anyway? It'll be just like we practiced last night."
"Yeah, but doing it for real...in front of everyone..."
"Will just be a means to an end," Susan finished, taking her by the hand. "We'll only need to get near Gil, and hope that every one else is distracted."
Mary felt her face grow hotter and her knees grow weaker as they approached him. "B-But I-"
"Need to follow my lead," Susan interrupted. Before Mary could say anything else, her sister had already forcibly smashed her lips into her. "Oh, well, don't mind us! Just a couple of virgin lesbians who have never experienced a man before!"
Mary began to blush. "Ouch!"
Susan had stepped on her foot, glaring at her and clearing her throat as a reminder she was missing her cue.
Mary quickly searched her brain for her line. "Um, yeah. It's not like we're looking to have a threesome, and, um, become sex slaves for life for any man interested or...anything..."
Johnny had doubled over himself laughing.
"They're kidding, right?" Dukey, in disguise, raised an eyebrow in disbelief.
"So, what? Are your sisters like, gay with each other now?" Bumper asked, confused.
"Sounds more like something they've just pulled from a poorly written porn movie," Sissy glared at them disapprovingly.
"Ohmigod, I can't- ahahaha- oh, wow," Johnny wiped a tear from his eye. "You guys are like, so pathetic right now."
Their scene had garnered some unwanted attention and laughter from around the pool.
Susan looked around, hoping Gil had noticed, but it seemed he was the only one who hadn't. In fact, he was talking to a busty brunette who happened to be standing nearby.
Mary, naturally being the more sensitive of the twins, was fighting back tears in her eyes as her face went bright red. She could barely see where she was going as she made a break for the house.
"Mary, wait!" Susan had followed her. "Where are you going?!"
"Just forget it, Susan! This isn't working!"
"No! It'll work! We were so close!"
"'So close?!' He didn't even look at us!"
"Okay, fine. Looks like we'll need to re-group and make a few adjustments. Let's go up to the lab."
Mary looked behind her at the pool party. She had hoped that teenagers of average intelligence or lower had a shorter memory than they did.