Mona has sex with a man in a car, doggy-style. Thrusting is shown but no visible nudity.
Mona and Tamsin are shown on several occasions wearing only bras and panties.
Mona and Tamsin are shown kissing several times. On one occasion, they are both nude, breasts visible. Tamsin gets up and goes to the window and her butt is visible in the shadows. Sex is implied but never fully shown.
Tamsin sunbathes topless.
Tamsin begins to seduce Phil but stops and mocks him when he gets interested.