Guest was bellas twin, not identical but they still look much alike. So when bella found Edward she was happy, she never really talked to the cullens but this was her sister.

it wasn't until a week after bella and Edward were dating until she decided to be friends with the cullen family

bella was ecstatic that Guest would join them for games and hangout during lunch. It was amazing but she seemed to grow closer to Alice and jasper the most, they both were a kind couple and they cared deeply for eachother and their family

it was shocking to find out the truth, that they were vampires, and not to mention that Guest was their mate. But she learned and loved it after a day or two. But after the ballet incident things grew a little tense between them. Alice always said-

*But after the incident at bellas party they left. Bella atleast got a goodbye from Edward, and Guest didn't get anything. Not a note, call, voicemail, or even Alice popping in her window to tell her what was going on.

It devastated her, she wasn't able to eat without throwing up for weeks and still cant sometimes. She couldn't get out of bed for days after they left, she smelled and felt horrible, so when she decided to focus back on herself it took a lot. She showered first and also brushed her hair and teeth.

and soon she was back at school. The only thing keeping her hanging was classes, music, and bella. Even though her sister hadn't talked to her in a month she wouldn't know what to do without her.

So when Guest got a call from Jacob that bella jumped off a cliff into water she was scared- no terrified and rushed home.

thats when she saw it. A familiar car she didn't ever want to see again. She ran inside to see if it was real and saw her standing there with bella and Jake. Alice.*