Dreaming of having sex with your father might indicate sexual perversion, maybe a call to behave appropriately around your dad, or might symbolize a lack of boundaries in how you relate with each other.

The symbolism of a father always represents a spiritual authority over our lives, as they are the head of the family and symbolize protection and provision. Therefore, we need to be very careful while interpreting such a dream based on its context.
The devil is a liar. He manipulates your dreams by disguising himself as your mother, brother, sister, or father in your dreams and paints an intimate scene. He wants you to think you slept with your relative to bring condemnation into your life. Remember, he is the accuser of brethren.
The thought of being intimate with your parent or child is tormenting and is strategically intended to make you think you have sinned when you have not. Don’t overthink the dream. Denounce it and reject the schemes of the devil. (Ephesians 6:11)
How do I know this is true? In the book of Job 4:12-19, we see a lying spirit manifesting in Eliphaz’s dream to accuse Job. While in chapter 1 God had already given a testimony of Job being a righteous man.
Not all dreams are inspired by The Holy Spirit, some are influenced by demons. Hence, we need to close every door the enemy might use to gain access to our lives, by being aware of what we watch, listen to, and read. Let the word of God dwell in you richly (Colossians 3:16).
Meaning of your father raping you in a dream
This dream reflects a disturbing situation in your waking life. Your father may symbolize authority over you. This person is pushing you beyond limits and straining you to do something you hate such as forcing you to achieve his youth goals which he never managed to achieve. This feels as if you are being taken advantage of, hence the symbolism of rape in your dream.
The dream can be evil especially if you are living in sin. The Bible condemns the sexual union between a father and a daughter. (Leviticus 18:10, 18:15).
“You shall not uncover the nakedness of your son's daughter or your daughter's daughter, for their nakedness is your nakedness.” Leviticus 18:10, ESV
The erotic dream may indicate there is a perversion in the family and you need to pray about it. If your father is not born again, then you should pray for him as he might be perverted.
Related: Can God speak to me in a dream if I am not a Christian?
Your father breaking your virginity in a dream
Your virginity is reserved for no one else but your future husband and him alone. The symbolism indicates great marital difficulties as you have made a covenant with your father through the shedding of blood, which has the power to bind you together as one. Sex is used to consummate a marriage, cleaving the two to become one flesh.
This is the reason why most ladies are still in their father’s house and have never found a life partner, and if they do the marriage doesn’t last, they always end up divorced and back to their father’s house, it’s a cycle. The covenant they made with their father sexually and unaware opposes those unions. If your father practices witchcraft, then he might have done so to put you under his authority and to gain more power.
God may be revealing to you what conspired, and the reason why you have been having marital difficulties to pray about it to be delivered in Jesus’ name.
Biblical meaning of making love with your father in a dream
In this case, he doesn’t force you, you consent to it. It means you are going to have a renewed relationship with him, probably if you had previous differences. It is not an evil dream for God has called us to the ministry of reconciliation. (2 Corinthians 5:18-19).
The dream can also reflect that there are various aspects of your father you admire a lot, such as him being hardworking and caring. This is what your dream is trying to convey using sex imagery.