It depends on the context and development of the story. Sometimes love alone can overcome many challenges, but in other cases, external factors might play a role.
Another possibility is that one of the other characters in PLL has a hidden motive. For instance, someone who is jealous of Allison's popularity or someone who she had an argument with in the past. They might have found a way to make her sick without being suspected at first.
Often, Allison adult novels tend to have more complex characters. For example, in many of these novels, characters are dealing with real - life problems like relationship issues, career struggles, or self - discovery. They are not just one - dimensional but have a depth to them.
Well, without more information, the story of Allison and Emily could be anything. Maybe they are sisters - Allison being the older and more protective one, and Emily the younger and more adventurous. They might have grown up in a small town and had to face challenges together like dealing with mean neighbors or trying to save their family's old house from being demolished.
I'm not sure who Allison and Twitch specifically are in this context. There could be many people with those names. If they are two ordinary individuals, perhaps they met at a common place like a coffee shop. They might have started as friends, gradually discovered common interests, and then love grew over time through shared experiences and deep conversations.
Maybe she would begin with a significant event that set the tone for the rest of her story. Like, 'It all started on that stormy night when I made a decision that would change my life forever.'