Sexy games in the pool

A group of friends had a party with the girls in a luxury apartment with a swimming pool. A girl in a red dress seduced one of the men to swim naked in the pool. When the man completely undressed, she playfully pushed him into the pool. At the invitation to join him, she took off her red dress, seducing the shy guy sitting next to her, and joined the man in the pool. When they started having sex, the guy left, leaving them alone. When he was looking for his other friends, he came across a couple secluded for hard sex.
The name of the movie: