The two mothers, each with a strip of leather, were now on the ends, while the fathers were next to each other gripping an arm of their child.Tall Tre... stepped forward from the shadow of the oak where he'd been waiting, and approached the two families. Without words, Tall Tree took the leather strips from each mother and wrapped one around each of the outstretched arms of the young couple. He then stepped back to allow each father in turn to tie a knot around the arm of the child who wasn't. Then I felt his cock pulse and his salty-sweet cum filled my mouth. I swallowed. There was so much of it. I gulped at least five times before his cock began to go limp. I slipped his cock out of my mouth and licked my lips. I just couldn’t get over how good he tasted.I couldn’t believe this! My little sister just gave me a blowjob and swallowed my cum. It was so wrong. We shouldn’t be doing this. But it was exactly those thoughts that turned me on most. As far as I’m concerned, I’m the luckiest. Eventually the two months came to an end. I had to return with my babies to the labs whilst the older children returned to Miss Lanes.Miss Lane and Margaret met me as I entered the school. This was unusual for Miss Lane who normally received everybody in her office. It was a demonstration of her curiosity and interest in the new babies. She billed and cooed over them like an old granny before Margaret and I took them to her labs to run some important tests. It was from these tests that we. My first week at the place I was, as can be expected, just trying to get comfortable in my new environment. I worked late nights, Cate left for work early in the morning, Lou worked sporadically, and Annie was in a school program, either nursing or dental or something similar.Well, my first weekend at the new place came around and I was horny. Annie was staying with her boyfriend all weekend while Cate and Lou were housesitting for some friends. I’d have the place to myself. So, I was.