I had a daughter aged 16 and we grew up together having sex until I got her pregnant and then ended up sex with my granddaughter

I was 16 when I first had sex and it was probably the most unlucky time of my life.
The sex was with a girl aged 17 named Laura and I had no idea what I was doing and she had no idea about contraception and after about 15 seconds of me shoving my dick up her, I shot my load.
9 months later, I was the father of a baby girl, Cindy.
Laura’s parents insisted on me having the child live with me and my parents because I’d ’ruined their daughters life’ and so one day they brought her and all her clothes and she lived with me and my mum and dad.