Racing towards something

Chris is sitting by herself against a tree, drinking beer out of a coffee cup. She's talking to herself while her friends walk over to see why she's being so anti-social. They ask her to come over to the party, but she refuses. She would rather sit by herself and think about how happy she used to be, and how fucked up everything is now. It first started while she was at a party. All the guys were swarming around her but the only guy she was interested in was Rob. They start talking and he suggests that they leave to go somewhere more private to talk, typical. While smoking cigarettes and drinking wine Chris and Rob start walking to a cemetery close by so they're not so out in the open. When they get to the cemetery Chris is immediately all over Rob, he tries stopping her so he can tell her something. Clearly he has a secret, but as naive and young Chris is she interrupts him and tells him "I know, I know". Rob was confused but didn't question it, but was still hesitant when he kissed her. While things were getting intimate between the two of them Chris notices something..."Rob was still there moving hard, eyes closed. And then....god, it happened so fast...it was dark, I remember kissing his neck...kissing him and kind of pulling open his shirt and...and then seeing something...something weird." She noticed the tiny mouth on his chest, it was making strange noises. Chris panics, they both start panicking. Chris asking why there's a small mouth on his chest that makes awful noises. And Rob wondering what Chris supposedly knew about. "But...you knew...you said that you knew." The next couple days were extremely awkward, Rob refused to talk to her about it in school. Chris, still sitting by the tree, drinking beer and being anti-social is offered another beer by a guy Steve then he asks her if she wants to go swimming. When they get to the lake there's a bunch of other people there, cheering on one of the other guys to go swimming. He strips and jumps in the water, Chris does the same. Chris realizes everyone else was staring at her, laughing and whispering to each other. She doesn't understand why they're laughing but she continues to walk into the water, what she doesn't know is her skin is tearing down the middle of her back...