Geminis (2005)

Incest is the main theme of this movie. Jeremías joins his sister Meme in the bathtub, both are fully naked. We get a glimpse of Jeremías' genitals & Meme's nipples for a second or so. No sexual activity takes place.

it seemed like Jeremías was about to receive oral sex from Meme in a bathroom but is interrupted before anything could happen, nothing is shown.

Jeremías & Meme have sexual intercourse on the stairs inside a night club, both of them moans heavily, no nudity is shown but the scene is pretty intense.

a character mentions that a 15 year old girl has got pregnant twice, the same character assumes & tells that the girl got pregnant by her father.

Meme walks in on Jeremías while he was lying on bed naked(his genitals are covered by his hands). She gets inside the blanket with him & they start kissing. Suddenly they begin to undress & have sexual intercourse. We don't see any graphic/frontal nudity (only breasts & buttock are seen).

Ezequiel(the eldest brother) learns about his younger siblings' incestuous relationship when he watches Jeremías coming out of bedroom naked while talking to Meme(we get a glimpse of Jeremías' pubic region). Moments later he sees Meme coming out of the bed naked & getting dressed.

We see bare breasts of a woman for few seconds as she gets dressed.

an elder brother punches his younger brother on his face.

a mother shocks herself when she finds out her younger son & daughter are having sexual intercourse & tries to beat them up. The son forcibly prevents his mother from beating up his sister.

a mother hits his son on his face with a broken glass & he starts bleeding.

very few characters are shown smoking but for long & multiple times.

the opening scene shows a detailed view of syringe needle been inserted into skin & blood comes out as it's removed.