Blackbelt (1992)

A woman (Hooker) is seen in lingerie. When her lover appears, she removes her bra, exposing her breasts.

A woman passionately kisses her teenage son on the mouth.

A woman is seen having sex with a man, with him thrusting on top of her.

There's a prolonged sex sequence between two characters (Shanna and Jack). Her breasts are visible. It is implied that the two participants take turns performing oral sex on each other.