I was parenting my nephew and Im scared

I was curios about child development and I googled it, but I think I need more opinions.

The situation:
My mother sometimes wants me to look out for my nephew (he is 9 months old) because she is cleaning his clothes. My nephew and I are alone in the room and I was reading some BL which may include smut sometimes. Its just a bother that he was also looking in the laptop and I dont know if he can know comprehend what I was reading, but Im sure that he has faster development copared to other kids because he can now perceive or see us and remember the face of each of my family member.
I need some advice, when will a baby can remember the things he see? Should I stop reading bl when he is with me?

Im just scared because I also clearly remember the reason why I had become gay, it was when I was 6 years old and I see some movies about a man being tied up and stripped off or he was been naked. I dont like him to become gay because he see me watching BL stuff, my reason is not because being gay is disgusting (Im not trying to offend the LGBT community), but rather because I dont want him to suffere the same humiliation I get from the society. Thank you so much if you have time to give me some advice in regards to parenting or caring my nephew.