Not gonna lie, i thought about it so many times x3

A witch that accidentally drinks their own love potion!

A party scene with a half dozen slots of people in costume for people to bid on. Not an orgy. I can imagine several things going on. One figure sitting is being hit on by a figure standing over him/her. Some figures are dancing. A couple are by the snack table, filling their plates. One lonely figure is in the corner, bored, on their phone. Whatever. Whether you choose the costumes or the bidders is up to you, but probably should be you for simplicity's sake.

Someone in lingerie getting laced into a tight corset, the rest of the witch's costume lying on the bed nearby.

Someone standing at a doorway giving out candy to real monsters at the door. YCH is for the figure at the door, the monsters are up to you.

One adult and one or two child figures carving a pumpkin.

Good luck!

Wow, so many ideas! Sounds really interesting, not gonna lie!

chibi friends at the door saying 'trick or treat!' with their candy buckets out, from the perspective of the person giving out candy.

My new girl, Lilith, said it best.