Start with sister

"I'll start with Anita and see where that takes me."

She gives you a devious smile, fully convinced this is the start of a harem whether you can see it or not.

"Whatever you say master. Just remember to save a load for me tonight."

Breakfast is...interesting with subtext. When your mom is holding a banana you imagine her looking longingly at it, remembering your erect cock, but that's got to be just your imagination. Meanwhile, Anita avoids eye contact while wearing a white midriff that fails to keep Victoria's Secret much of a secret. It's easy to mentally undress her now considering. From an outside observation it's just awkward silence.

"Did something happen between you two recently?" Mom finally asked.

"What? Nothing happened." You say in sync with her, really screwing with her head as she tries to figure out the implications.

"I must have just been hearing things. I hope you two are at least getting along."

"I suppose you could say that. I certainly feel like we've gotten closer."

"I'm done with breakfast. Excuse me."

She goes off in a hurry, perhaps disturbed by the imagined context of the conversation. She probably really doubts reality right now. Time to give her a nudge in the right direction.

"Don't worry, I'll talk with her in a bit. She'll open up to me."

"That's very sweet of you."

You mentally prepare yourself, and the video in case you need it, and check up on her.

"Hey sis, what's up? Is something troubling you?"

"Go away. Idiot pervert."

"Come on, where is that coming from? Little stuff aside, we're still siblings."

"Answer me honestly. Are you attracted to me, like, as a woman? I won't yell or hit you or anything."

"Well, you're at least an 8 in my book. Would I give in if you escalated teasing into full on seduction? I wouldn't know."

"Another question, if I weren't in my right mind, you wouldn't take advantage of me, would you?"

"How can you ask that? What's going on with you?"

"I don't know. I had this weird dream and now I feel like I'm losing my mind trying to figure out what's real."

She hugs you tight looking for comfort, and what she feels pressed against her waist, is your semi-hard dick. She looks you in the eyes.