Find the old stripper song, set up the video camera with that playing in the background and show how much weight you have lost.
Do it as a spoof, have the camera cut away at the right time so you don't show more than you want to, lots of swaying hips and belly rolls., suggestive sliding the gown down the arm, and back up again.
In other words, make a funny video and have a laugh doing it.

One or both daughters would probably jump at the chance of helping.