They're happy to have me volunteer. Mr. Sullivan isn't the most popular resident and more than a few of the volunteers are afraid of him. Well, maybe ...afraid is too strong a word. But he makes them uncomfortable. I think he must be nicer to me than he is to most people for some reason. I happily went to the elevators and headed up to his room.His door was partially open when I got there. I knocked and his face lit up when he looked up and saw me. He invited me in and I closed and locked the door. Miri reveled in the kiss and twisted her tongue around his. She grabbed around his waist and pulled him closer to her. He let go of her head and brought her arms from his waist to bring them around her back again. She moaned in mock protest but he knew that it made her more wet. He loved that.Turning her around and letting go of her hands, he kissed the back of her neck while mauling her breasts again. His kisses turned to bites and he twisted her nipples to a point of slight pain. Miri whined. He was sliding them up and down her pussy and she was starting to convulse and raise her ass to his fingers. He held up his fingers and we could all see they were glistening with my sister's wetness. I noticed a menacing smirk on Brian's lips as he looked up to meet my eyes. "Looks like I'm going to teach your older sister a lesson." At this statement, Chad immediately exploded and jets of cum erupted from his cock. He couldn't believe he was seeing his babysitting tormentor getting punished. We almost always had orgasms at the same time and this added something intimate to the sex that made it even more magical. He slowly pulled out his still stiff manhood and gave gentle kisses on my neck."Thank you, baby. It was amazing." I gasped,"For me, too, honey. I love to fucking your tight sloppy hole." He said. I grabbed his thick meat, gave him a few gentle twists and then we showered together."As good as it was we have to hurry. Sarah's train is about to arrive. You had to fuck me right.