The middle of the night with breeze and the two in love together marks the night of Maha Raas.
Maha Raas is the royal night which signifies the coalition of Lord Krishna with his beloved radha. It was based on pure love and devotion of Radha towards him with no ego of the truth that she is one who delights him.
She wanted to be with him and now she is. Even Lord himself is pleased to spend his royal time with Radha. They had no other feeling for each other than respect and love of the purest kind. This bond between the two is witnessed by the lotuses in the lake, the breeze and is remembered till date.