Sister's infected???

As Jessica was contemplating on her story Brittany noticed how all of a sudden she was getting hotter than normal. At first she just thought it was the stress of the day. She had been thinking of how hot it was to be watching someone have sex. A few days earlier she had been walking by the professors class and seeing him fucking the blonde turned her on more than she had admitted before. As she sat there and watched the blonde and eventually every class member fucked so hard, she noticed her hand had reached into her panties and she began fingering her pussy. She was just about to reach her orgasm when it dawned on her that she would surely be infected if anyone found her. What she didn't realize was the fact that the smell of sex was also clouding her senses. She walked away and for the last couple of days it had gotten harder for her to concentrate. Today Brittany got home before anyone else and she was the one who brought the cookies and milk into the house. As her sister got home britany had already started feeling the warmth again that she felt at school a couple of days ago. She watched and listened as her brother was jacking off. It took everything to go across the street and even more watch the struggles.

All of a sudden Jessica in her thoughts thought she had heard a moan coming from the bedroom. As she walked into the bedroom she was shocked at the scene in front of her. Right in front of her was a woman that looked familiar but this couldn't be her sister. This woman tits were 2x bigger than her sisters and her but had grown bigger as well. This woman was using a dildo she had found on her virgin pussy. If it wasn't for the girls complexion she wouldn't of recognized her. Brittany what are you doing don't you realize that you could get the infection from that. That's Mrs. Hopes and she has been infected for a while now. Brittany looked up come on Jessica why don't you join me it feels amazing beside I disinfected it earlier. Brittany have you looked at yourself. Brittany gets up walks over to the mirror and with a gasp "I look so good and feel great" at that Jessica ran from the room locking it behind her. As she leans against the wall she collapses wondering what to do now.