When she comes back late after a date. Her father was mad at her but she misbehaves and reacts by slapping him. At this point, father completely lost it and says "I'll make a woman out of you" and start fucking her forcefully and cum inside her.
Daughter warns him that she is not on the pill so but the father does not stop says and says that's her problem shoot his cum inside her petite pussy and leaves the place by saying "You're a woman now"
This incest scene is from the German movie HILFE PAPA FICKT UNS ALLE