My dad had consented sex with his unadopted step daughter
I found out about my dad having consented sex with my mom's daughter from her first marriage. She was 7 years older than me. I heard her say that the royalty used to have sex. I didn't know what she meant. Mother knew and turned a blind eye. I confronted my dad later on. "You saw her in a bikini didn't you" was his reasoning. They were not related, and my sister appreciated the opportunity to make love to my dad. She loves him dearly and never held it against him. In retrospect, now I have to say that I can not blame him. She DID look hot in that bikini!
Their not related so that's ok but he would have been really hard thinking he's fucking he's daughter