There are studies which show that couples engaging in role-playing together have better sex lives. Experiment with a little role-play. Make up backstories for your characters ahead of time, dress up, and have fun with it.

You can use some of these products:

https://www.amazon.com/ILUCI-Lingerie-Clearance-Babydoll-Sleepwear/dp/B07F1SQT4J/ref=sr_1_3_sspa?ie=UTF8&qid=1537749903&sr=8-3-spons&keywords=sex+dress&psc=1

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https://www.amazon.com/TOB-Womens-Summer-Bodycon-Sleeves/dp/B06Y5GCY9Q/ref=sr_1_6?ie=UTF8&qid=1537749903&sr=8-6&keywords=sex+dress

https://www.amazon.com/VANCOL-Womens-V-Neck-Halter-Backless/dp/B06XYHSQZQ/ref=sr_1_5?ie=UTF8&qid=1537749903&sr=8-5&keywords=sex+dress

https://www.amazon.com/Woaills-Bodydoll-Crotchless-Wholesale-Nightwear/dp/B078KWS24V/ref=sr_1_12_a_it?ie=UTF8&qid=1537749903&sr=8-12&keywords=sex%2Bdress&th=1

https://www.amazon.com/Allegrace-Stretch-Bodycon-Bandage-Dresses/dp/B016ZYOG2C/ref=sr_1_13?ie=UTF8&qid=1537749903&sr=8-13&keywords=sex+dress

https://www.amazon.com/MAGICMK-Suede-Sleeve-Shoulder-Party/dp/B07CSM7NYH/ref=sr_1_15?ie=UTF8&qid=1537749903&sr=8-15&keywords=sex+dress

https://www.amazon.com/Challyhope-Harness-Bandage-Triangle-Bralette/dp/B07BDJM5ZR/ref=sr_1_20?ie=UTF8&qid=1537749903&sr=8-20&keywords=sex+dress