The pain was instant and intense. It felt as if a baseball bat was being forced into my ass. On seeing Sam's splayed pussy, my cock had hardened even ...further and I knew that with the briefest of touches I would cum. As John worked his cock, inch by inch into my ever widening anus the pain began to subside. An entirely new sensation overtook me: a warm heat began to build in my loins and spread over my entire lower body. My cock ached painfully needing relief. But the monster in my butt kept. She sent him a flirty text.He answered back saying he didn't think she was talking to him. They messaged back and forward,me reading everything.At one stage he mentioned her tits,saying how lovely they were.She sent a selfie pic of them,her hand almost covering them.These ? she asked. He sent a pic of his cock, which was hard,and looked even bigger she said.She told him she wanted him to cum,there and then.He said he couldn't, he was in work.She said if he did, she would send him another pic.. Our lips weren’t leaving each other. But I pulled out before she started biting them.Soon I was sucking my sister’s breasts one by one and in turn, she was moaning in pleasure. I sucked her for a long time like I couldn’t get enough of it. Then my sister grabbed my neck and pushed me on my back. She opened my pants and began eating my cock from my underwear! She was biting my cock through my underwear and it pained a lot.Then she pulled down my underwear and swallowed my cock. My horny sister. You said you do it to yourself. Let me do it to you. Show me what to do"."Yes", Vera siad. Why not? I`d like that".She took my hand and pushed my fingers into her pussy. "Now move it about in there. That`s right. Oh! It`s happening! It`s wonderful. Don`t stop!"When she was finished I dressed and she returned to her bedroom to dress.We went downstairs and sat in the lounge, talking about the naughty things we had done. Our parents had not yet returned. I told Vera that I had never been tossed.