No, you want to learn more about your sister first.

Your eyes widen in shock, arousal, and a strange curiosity. It is weird to hear that coming from her, mostly because those SIS and BRO porn videos never really interest you. The genre sort of disgusts you since you never really understood why that was so arousing. Even now, it is hard to view Stacy as a sibling: someone you grew up with all your life, someone who was a enduring presence in every waking hour.

Stacy stares at your confusion with concern.

"What's wrong, big bro?"

"Stace, how do you feel?" you say.

She thinks for a second. "It's weird," she says after a beat, "one set of memories tells me I met you in high school, and we've been together ever since. The other tells me that you've taken care of me ever since we've been born, and we're siblings. You're a few years older."

"That doesn't make sense at all," you say. "We have neighboring birthdays." In fact, Stacey is the older one.

Stacey frowns for a moment, resurfacing hidden memories. Her face turns beet red. She looks down at her breasts. "What did you write on me?" she says.

You tell her what you wrote on her, and she flushes an even deeper red. "Oh. My. God. That explains why I'm so attracted to you. And the big bro thing as well." She says. "In this world, I masturbate every night against the wall neighboring your room. And all I can think about is getting fucked by you, my big brother."

"Wow, that is a really big change." You say. Your dick is hard, and you can feel your cheeks flushing as well. You hadn't noticed, but now you had. "And hot, too."