The Hot Tub

On a getaway weekend to Vermont, Dan and Cathy are visiting Dan's old friends Charlie and Maggie. On the first evening Cathy is sick and retires the Bed and Breakfast for the evening leaving Dan to go to the bonfire party with Maggie and Charlie. Charlie leaves Maggie and Dan so he can moderate the events. Maggie flirts with Dan throughout the evening until she decides to show him around the unique house overlooking the bonfire.
Inside there is a hot tub in a green house.
Maggie invites Dan to join her in the Hot Tub and it doesn't matter he doesn't have a suit.