A groan escaped her lips as she began to slide it into her ass. It took a substantial push to get the largest section past her sphincter. It felt as t...ough her sphincter snapped shut like a rubber band. She whimpered in excitement as she pulled her suit back into place, hiding the flange of the plug.She looked at the control in her trembling hand. She hesitated for a second and then she pushed the button to turn it on. "Ohhhhh God!" she groaned and her knees almost buckled as the hidden plug. Edmunds by way of a narrow lane. As we were driving along it, it was just beginning to get dark and she asked me to pull into a field opening and park whilst she got changed. By getting changed what she actually meant was taking her dress completely off, revealing that she was wearing a matching set of dark blue underwear including bra, knickers and suspender-belt with black stockings! My cock started to stir and was soon uncomfortably rock hard inside my trousers.My naughty wife then sat back. She took the hand bracing the beautiful round globe for her mouth and reached around Margo’s waist to pull up at the hem of the dress until it was bunched up around her torso. Now her rounded bottom was exposed to Max and he could see what Nadia was doing. “Margo, slide off Nadia’s panties so I can see her too,” came another command. Instantly Margo complied, the muscles of her tight thighs bunching as she rose a little off Nadia. Nadia’s hips rose from the couch slightly to allow her. She replied. I told her to wait there while I got ready. I grabbed the bottle with Sarahs hair in it, a plan quickly forming. I placed it on the desk and went into Brittneys room and changed into white knee length socks, white panties, a red plaid school skirt, white blouse and blue blazer. I returned to the room in the new clothes. Sarah started to giggle and asked me why I was dressed like that. I told her that it was all part of the show. I took the potion and turned into Sarah before her.