I literally just had a discussion with a client last week about a feature taking 2months to develop.in my time this week I built the UI, with no backend, and she asked why I quoted two months when it looks like it's already completed.
Yes, it "looks like it's already completed" because you did the "looks" part. I get that you want to show them that part to get approval of the design approach, but it opens the door to misunderstandings like this.
Maybe as part of the demo, you should demo that it *conspicuously fails to actually do anything", to help reset unrealistic expectations.
