Alec might also come to her rescue. As a skilled Shadowhunter, he has a strong sense of duty. Plus, he's part of Clary's group, and he wouldn't stand by and let a fellow Shadowhunter be attacked by a demon.
A third plot twist could be that the attack is a diversion. While Clary is fighting the demon, something much more significant is happening elsewhere. Maybe a powerful artifact is being stolen or a key location is being infiltrated, and by the time she realizes it, she has to race against time to stop the real danger.
Well, she might be rescued by her friends. In many fanfictions, her Shadowhunter comrades would come to her aid, using their unique skills to fend off the attackers.
Another character who has a personal vendetta against Clary or her family. For example, a jealous rival or someone who blames her family for past misfortunes. This would add a layer of drama and personal conflict to the fanfiction.
Simon might be in a bit of a panic. Since he's her friend and also not as used to the dangerous situations as the other Shadowhunters. He'd try to do whatever he can to help, like getting help from more experienced Shadowhunters or trying to comfort Clary while she's in pain.
The theme of future and responsibility is also often explored. Clary has to think about not only her own future but also the future of the baby. This includes things like where she'll live, how she'll raise the child, and how it will impact her goals and dreams. For example, if she was in the middle of some important mission or study, the pregnancy will force her to reevaluate all those aspects of her life.
Well, in this fanfiction, Deeks might face a physical attack from an unknown assailant. Maybe it's someone from his past, like an old enemy he made during one of his cases. He could get injured badly and have to rely on his friends and colleagues to help him out.
On the other hand, there could be a glimmer of hope in their relationship. Maybe through the shared experience of the pregnancy, they start to see the good in each other. Clary might see a side of Sebastian that she never knew existed, and Sebastian might start to have real feelings for Clary and the baby, leading to a more complex and evolving relationship.
Finding 'Clary Gets Drunk' fanfiction can be a bit tricky. You could also check out some fanfiction forums. Sometimes, they have threads dedicated to specific types of fanfictions, and you might get lucky and find what you're looking for.