She lets out a little cry of delight when he picks her up and she wraps her arms around his neck. He places her down on the bed and is feeling around on her sides. Looking for the zipper, she realizes.

“It’s in the back.” Midge rolls onto her side so that Robert can find it and pull it down. “There’s a corset sewn into the dress, so you’ll need to unhook that too.”

Once he gets the zipper down her back, he should see the black mesh-like fabric held together with eye hooks. Hopefully he knows how to undo those. It’ll be practice for undoing her bra soon afterwards.