Take her up on the offer

I decide to shower. I start to take off my clothes. Becka makes no effort to conceal the fact she's watching me undress. I have to admit it's kind of exciting getting naked in the same room as my sister. I can't help but steal glances at Becka's naked rear, envisioning sliding up behind her and nestling my cock along the crevasse of her ass.

{if Horniness<0}My sister looks approvingly at my tool hanging between my legs.{else}Inevitably my manhood begins to swell. My sister looks approvingly at my semi engorged rod.{endif} "Very nice Bro, I'm sure that's very popular with the ladies."

I smile at her, I can't help but be a little bit proud of my manhood. "I get no complaints," I say as I step into the shower. I'm just about to close the shower curtain, when I see Becka turn to face the shower, revealing her entire naked front to me.

Becka puts a hand on one of her naked hips and says,"And just who have you given the opportunity to comment on your little soldier there?" {if Horniness<0}She glances at my flaccid, but I'd like to think, still impressive member{else}She glances down at my now fulling erect rod{endif} smiling, "I thought you and your dear wife had been together since you were basically kids?"

I give her a look and promptly close the shower curtain, hoping to avoid the question.

Becka's not quite done though, she pulls back the curtain just enough to stick her head into the shower, "Brother, do have some dirty little secrets to share?"

Being confronted like this naked makes me uncomfortable. I turn away from my sister and simply say, "No."