"I confessed that I had known about her since I had recognized the song she was whistling. It was Stevie Ray Vaughn's "If the House is Rockin'" and wo...ldn't be written for quite a few years yet. Before I could start Beth got home and I made the mistake of introducing her as my sister. Tina scowled and informed me that that wouldn't fly before I could correct myself.As I started over Beth got a cup and joined us. After she got settled I told her of my life before and when I was finished she. It was fun, I was nice to everyone but sat nice and close to Bill – what my free hand was up to, under the table, was no one’s business but ours. Hell…they all knew what was going on anyway.By the time we got to the room he was more than ready to use the bed, or the table or a chair; anything to get me bent over and spread wide. All I’d done, all day long, was prime the pump – I was about to be ****d in a loving way.Foreplay was very quick; Bill was beyond ready to fuck by then! My day-long. .." and then she literally engulfed my cock.Now, having "Petty Officer Coates" positioned between my legs and sucking on my cock like it was a lollipop, is a scene I cannot fully do justice to with any amount of words. Simply put, she deep throated me for about a minute and then kept me on the edge of exploding by teasing my cock with her tongue, hands, and tits for over 15 minutes. Finally, she showed my throbbing cock mercy and just hummed away expertly for another minute. At the point of no. She has always been my big sister and someone who looked after me when I needed it, so the change from that to someone that's in charge of me legally isn't such a big step. But for her she's suddenly responsible for me without anyone else being in charge of her. She's gone from being barely an adult trying to find some independence from her family to legal guardian and provider to her younger sister." A big step."I nodded, "Yeah, she still forgets sometimes. When I ask her for permission to do.