peeping

Q: If a daughter looks at her parents having sex through a small hole. She was young and saw her dad's penis erected and looked for a little while and then felt discharge within her while looking. She can't remember exactly if there was lust with in her but she just looked at her mum and dad having relations and saw her dad's penis erected. But can't remember exactly if she had lust or she looked just so. But she said she don't think she would have lust for her dad. Is her parents nikaah valid?

Q: I have 3 mental diseases ocd, psychosis and split personality disorder. And sometimes I look at windows of homes when I am not in control and I am stuck in a position to try to look away from them due to it being a sin. I unfortunately sometimes choose the wrong direction to look away from them for example, The window will be covered in a curtain but the sides will be left blank due to the curtain being too narrow to cover the whole window. Do I get a sin for accidently looking into the house in that matter or when I see just the darkness of the room from the sides in this case?