" "Oh god, Susan, I'm going to hold you to that." "Well then, you better cum baby. That offer will expire soon." I wrapped my arms around her ba...k and held her against me as I started to thrust hard. Her body shook powerfully each time my hips slapped against her ass, making her grunt each time I hit bottom. Susan's mouth hung over mine and our tongues clashed and flicked, sharing an open-mouthed kiss that drove me wild. My blood ran hot and carried that heat as it went rushing through. I cuffed her hands behind again and put her collar and leash on. I attached her collar to a chain with a master lock then literally destroyed the key. The chain is about forty feet long and it is buried about four feet deep into a cement wall in my sister Emily’s sex dungeon. I gave her a lot of length on the chain since she will be on this chain for the rest of her life and I want her to be able to pace around in her sex dungeon when I’m not using her.Now that I had emily ready for her prom. “We can shut the door and lock it. If someone comes you can hide in the shower. I’ll say I don’t know where you are. That you woke me up and left. Maybe you’re outside smoking weed.”She rolled her eyes and laughed.“That would probably be better than what we’re actually doing.”She stood up and walked to the door. She hesitated for just a second. I thought she might change her mind and leave me to take care of myself. Then she shut the door and locked it.I came up behind her and pressed. I couldn’t have said it better I muse as I soak up the sexual pleasure, my first in more than a week - an eternity for me.Someone is moaning, “So good, so good, so fucking good.” Then I realize it is me as my whole body shudders with a huge orgasm and I squirt. I am still squirting as the three women mutter in turn, “Awesome Sarah, fucking awesome. How do you do that?”“Show these women how good you are Sarah, I love being pleasured by a sexy, horny, older woman,” Julian teases as he strokes his.