Made his girlfriend have sex with him in exchange for silence

The young girl slipped into the house at seven in the morning, after the whole night of parties. She planned to go quietly and go to bed quickly so that she would not notice her stepfather. But the man was waiting for her half of the night and there was a mood for a serious conversation. In his hand, the incriminating evidence for the girl and he is not going to be silent at all in front of her mother. Will the girl lead to his threats and decide to have sex in exchange for silence?