Sleeping beauty.

You go to the older Sister's Room and open the door slowly.

You aren't greeted right away, so you're confused.
A quick glance around the room reveals the reason- she's asleep.

Aw, she's so...beautiful.

She must have stripped while waiting for you and took a nap.

The chair creaks as you sit in it by the door, which is enough to awaken Rebecca.

"Oh...oh, I'm sorry. I didn't hear you coming, Master."
"It's alright. So why were you sleeping?"
"Well, I know Aunt-E enough to know that you'd be a while with her. After that, I'd hoped you'd come right to me.

When I saw you go to the Bathroom, I figured Mom and Sis would keep you busy until tonight."
"Not a formal visit," you say, "I just wanted to check on them. I wouldn't make you wait that long."
"Aw, thanks, Master. So are you ready to make me yours officially," she says, sitting up and playfully hiding her tits.

"I am ready for you. Are you ready for me?"
"Let me show you how ready I am."

She looks sensually towards you as you undress.

She licks her lips at the sight of your cock and keeps watching.
"Come here."

She crawls towards you...

This is going to be fun.