I think it was real but enhanced. Jack filmed a story for Instagram which showed her washing/wiping her bruised eye with a flannel. It was filmed for us but her account was locked at the time so not everyone saw it.So did Jack have a real black eye and enhance it because it didn't look very bad in the photo? Or just "make up" the whole thing.
It was definitely a bit bruised but the swelling had gone down by the time she filmed it.