"Stripping"

"We're all gonna see each other naked before the night is over, so let's just take care of that right up front?" Tess seems insistent. You've always viewed her as a cute, silly, girl. Suddenly you wonder if she's always the type to take control during sex.

Although it hasn't really registered in your brain that what's happening right now is sex. Still you get a step closer to registering it once Tess has stood up from her chair, reached around her back and in one motion, pulled her top up over her head, exposing her perky, b-cup breasts to both you and her sister. And they're lovely, round, flesh, nipples bigger than Katie's.

Katie just stares at them. Surely she's seen her sister's breasts before. But never like this.

And you're a bit surprised by yourself, that you hadn't noticed all day that Tess was going braless. Maybe, you think, you really didn't think of her that way. Of course, now you can't think of her in any other way.

Tess stares back at her sister. "Well?" She says intently. "Aren't you undressing."

Katie gives her head a quick shake, as if she's got to clear out some distracting, dirty thought, then answers "I thought we were going to do one at a time like presents on Christmas morning." The statement immediately underlines the reality that these two are sisters, who've grown up together. Christmases, birthdays, vacations, everything. And now they're doing this.

Tess thinks for a second. Then she turns to you. She's being incredibly casual for standing topless in front of her sister and her sister's boyfriend. "Well it's your present. How did you do Christmas morning at your house? One at a time, or all at once?"