My mum raped me on my 12th birthday and nearly a year later gave birth to my sister, who is actually my daughter.

I’ve never shared this event in my life with anyone, I’m in my mid 20's now and this happened when I was 12, it was my birthday and I had a great party with all my friends, it was a perfect happy day in my life, however, that very night, after everyone had gone home, my mum raped me.
It only happened once and I never told anyone, until now.