Tales of Helen and Lisa By Sam James Chapter 6 - Happy Birthday Lisa! The unusual triangular sexual relationship between Lisa, Helen and I never ceased to amaze me and could usually be relied upon to provide some excitement. Especially fascinating was the competitive sub-dom relationship between the two girls, which had existed ever since that epic evening when Lisa had first displayed her awesome physical strength, destroying Helen's confidence in her own powerfully muscled body and forcing her into a submissive role in the friendship. What happened on Lisa's birthday was no exception! We had spent a lazy day at a friend's riding school in the forest, a few miles away. Lisa and Helen had taken two of the more spirited stallions and ridden for miles, I had preferred to laze by the pool! We had finished up with supper (which I had cooked) at Helen's apartment and then decided to walk down to the lake before dusk settled. It was while Lisa was in the loo that Helen came over to me in conspiratorial fashion and said, "As it's her birthday I think Lisa ought to be ducked in the lake". I looked at her as if she was mad. "Oh yeah, you and whose army's going to do that?" "Well, I thought that if we go down that path to the swimming platform and both grab an arm at the same time we could give her the bum's rush before she knows what's happening". I really didn't think we stood a chance against Lisa's strength, but it would be fun finding out, so I agreed. The path went along the top of a steep bank above the lake and then split, one branch going down to the swimming platform, the other going up some stone steps and back up to the school. I don't know if Lisa suspected something, but as we neared the split she suddenly said, "Let's not go to the lake, I'd rather go up the steps". Helen glanced at me and then I saw her make a dive for Lisa's right arm. We were at least 30 yards from the water, which lay behind a low hedge at the bottom of a steep, grassy slope, but Helen had committed herself and I could only back her up by grabbing Lisa's other arm. As she felt us take hold of her Lisa did the only thing she could ... and it was stunningly effective. She dropped to the ground like a stone, dragging us with her off the path and onto the grassy slope. Then the real fun began! Using all my strength and weight I was just able to hold Lisa's arm pinned, but on the other side Helen was in deep trouble. Lisa had wrenched her arm free from Helen's grip and had trapped her in a fierce necklock. I could see Helen's muscles bulging as, with both hands on Lisa's wrist and forearm, she tried desperately to open the PE teacher's arm. But her face was going red and she was steadily being strangled as Lisa's arm contracted like a steel cable. Suddenly with an explosion of power Lisa turned Helen over on to her back and between her legs, which slid round Helen's waist and tightened with constrictor-like strength. Helen gave a strangled moan, but refused to submit, fighting frantically to escape from the silken vice of Lisa's limbs. She writhed and strained, sobbing with effort, the sinews on her broad shoulders rippling and coiling and her muscles standing out in desperate effort. Lisa turned her head towards me with a mocking smile, "Can you let go my arm, please Sam, I've got cramp ... I promise I won't use it!" I rolled off, but releasing her arm had an hilarious result. My weight had been acting as an anchor on the grassy slope, damp with the evening dew, and suddenly Lisa, complete with the wildly struggling Helen, began to slide down towards the lake. "Oh, shit and bollocks" howled Lisa as they tobogganed downwards, disappearing through the hedge in a cloud of twigs and leaves. I waited, but there was no sound of a splash so, almost helpless with laughter, I slowly edged my way down the slope and through a gap in the hedge. I found the girls on a narrow grassy ledge at the water's edge, standing breast to breast, kissing passionately. Helen's right hand was down inside Lisa's shorts and the gasps and moans coming from Lisa told me it was time for me to disappear. I went back up the path and sat on the stone steps, enjoying the view as dusk settled over the lake. Suddenly the silence was shattered by a strangled scream and a huge splash. Several minutes later two figures came up the path from the lake. One was bone dry and laughing, the other was sodden and bedraggled, with water weed still festooned in her hair and muttering a most unladylike string of obscenities. I was astonished to see it was Lisa. As they saw me they stopped and Lisa glared at Helen, "That was the sneakiest, lowest, most underhand....." she stopped and suddenly for some reason which I couldn't fathom, laughed at what she had just said. "Yes, underhand is exactly the right word I think!" Then a note of admiration entered her voice, "But I have to admit, honey, that was some display of strength". Helen gave a mock curtsey. "Thank you, ma'am... I'll take all that as a compliment! Why don't you go on up to my place and take a hot shower... Sam and I will be up shortly". Lisa nodded and squelched away up the path as Helen came and sat next to me. I turned and looked at her. "A few minutes ago you and Lisa seemed to be... er, enjoying each other. How come Lisa ended up in the water?" Helen gave me a broad grin. "Well, I was determined to get her in the lake, but I knew she would overpower me unless I could take her completely by surprise and when she was least expecting it". My brain was in a whirl, but I still didn't see how she'd managed to dump Lisa in the lake. I said, "OK, so you took her by surprise - what's with the feat of strength?" Helen gazed at me as though I were simple. "Oh, Sam, do I have to draw a picture for you? She stretched her right arm out straight towards my crutch and her bicep suddenly bulged as she bent the arm sharply upwards at 45 degrees as though she was lobbing a ball into the air. Suddenly it sank in. "Jesus Christ, you didn't... " "Yes, I did!" said Helen gleefully. "But I don't think she's too unhappy ... she'd cum over my hand so much I nearly lost my grip!". I shook my head in admiration and Helen said, "I've promised Lisa a slap up supper, to which you're invited of course." Then she put her hand gently on my cheek and said softly, "But I'm afraid that's all you'll see of me tonight - Lisa's staying and I have some making up to do!" (To be continued)