My dad started putting his penis in my mouth as early as I can remember.
I grew up thinking it was normal but knew to not tell anyone, even mummy, as he said it had to be just between us.
When I was very little, it was only the tip he could fit in but as I got older he gradually got more of it into my small mouth and he had me suck it as well. I think I was about eight when I was essentially giving him full blowjobs. This was obviously only when we were totally alone together. He would always ejaculate in my mouth and I grew up swallowing my dad's sperm as if it was the most normal thing in the world.
At puberty he would start rubbing my small growing breasts as well. I started to realise that what he was doing was considered wrong by most people but I was so used to it and never felt like my dad was abusing me even though I suppose he was.
It all stopped when I went to university.