So flabbergasted by the mass of schlong meat in front of you, you can only say "Holy Shit." To your credit, you did not scream out loud. Anna's stony visage broke with a small smirk in reaction.
"You sound like you've never seen a dick before, Zack." she said playfully. Still stunned, You really couldn't respond even if you wanted to. Instead you simply stare at Anna's appendage like a hawk. A vein as thick as his pinkie traced a branching line down her dick, all the way to what you assumed where the head was. The head was tightly covered by her foreskin, the ends forming a donut hole around the tip. Melon-sized gonads swung in a smooth hairless sac and did not look the least bit stuffed.
Done with your inspection, your words finally return to you. "So..." you say, as your eyes look back up towards Anna face which had morphed from a simple smirk to an amused grin. "...Zoey has a dick too."
"Yeah, and her's is bigger than mine." she said, mischievously shaking her hips to bring some attention back to her soft dick and fat balls. You resist long enough for her words to process through your head.
"Wait, her dick is bigger?!" you exclaim, just barely keeping it low enough so it doesn't attract any unwanted attention from the other rooms.
She shrugged one-handed. "Well, yeah. Didn't you ever notice that she doesn't wear any kind of pants except baggy ones."
That made you stop and think. Anna was right. In all the time you and Zoey spent together she always wore unnecessarily baggy pants. Not just any kind of baggy pants either, but giant ones made for the incredibly obese. You never asked her about it nor really cared to because she somehow managed to pull it off beautifully. To think that she wore them because she had a massive manmeat attached to her was...psychologically damaging to say the least. You stumbled around Anna and sat heavily on your bed. You vaguely noticed Anna sit right next to you, her legs splayed apart out to make room for her giant package. They didn't say anything for a while, though Anna tried too, more than once. Finally, she was able to break the silence. "Um, I'm sorry Zack. I honestly thought you knew, you know."
You sigh heavily. "It's alright. I still love her, but it's just...how am I supposed to...you know...'seal the deal'?" You sigh again, not wanting to think of how gigantic his girlfriend's dick is. Anna bit her lip, guilt that she might be the one who ended her sister's love life. Then a sudden brilliant, and very naughty, idea came to mind. She turned towards you. "You know...I could always...help you into it."
You turned towards her, not really understanding what she's asking. "What?" you say bemusingly.
"To help...you know...break you into it, you could..."