The two men had decided on a slight modification of the ship's engines. John had to ask Don several times for answers he should have know. He was obvi...usly distracted but the crew needed a competent pilot if they were to escape the desolate world they were currently stranded on.Penny and Will were fighting -- as usual. Siblings, siblings -- thought the rest tolerantly. They would be pals again soon enough.The robot worked tirelessly and without complaint, as usual, at whatever task he was. A handsome, horny male passenger can always get a piece of pussy from one of those young ladies who like to ride a friendly cock. But I didn't have time. I was in a hurry to get home... and home for my pecker was that tight, warm, snuggly place between my little sister Tina's legs.I know you'll agree it's natural for a brother and sister to love each other, but I meant a lot more to Tina than just being her big brother. I was the guy who took her virginity... the guy she took down her panties. Then he thought how early she would have had to go to bed the night before, which in turn led to a picture of Alex and she in frenzied sexual congress, and that resulted in a feeling of annoyance. At least he thought it was annoyance, and pushed down the idea it might be jealousy.For once the children were awake late, and when he was washed, shaven and dressed, he was in time to have breakfast with them, and it meant that Celia had to eat with them, since she was feeding Beth.Nothing was said. How great!I poured us each a glass of wine which we sipped as we laid in bed. I hadn't fucked her yet but it was great being with her and we both were having a lot of fun BUT I was happy when she said, "J**, roll over on your back so I can give you the best fucking blowjob you ever had". I did as I was told :) Mary went between my legs and started kissing my already erect cock. I liked that she started slowly, alternating between kissing and sucking the head and then my shaft. Her mouth was.