Part 15. Bella's machine fetish gets taken to the next level, and so does Sean, Ava and Melanie's twinning obsession. Note: This one gets more graphic than usual. Thanks to <span class="username-with-symbol u"><a class="u beta username" href="https://clancy688.deviantart.com">clancy688</a><span class="user-symbol beta" data-quicktip-text="Beta Tester" data-show-tooltip="1" data-gruser-type="beta"></span></span> and <span class="username-with-symbol u"><a class="u regular username" href="https://dkfenger.deviantart.com">dkfenger</a><span class="user-symbol regular" data-quicktip-text="" data-show-tooltip="" data-gruser-type="regular"></span></span> for contributing to this piece, whether they knew it or not. Anything you don't like is my fault, of course.