I know that my cousin sis watch porn( I saw her history ) but how can I approach her

Hii 18M here. I have her gmail so I check her history sometimes and I got to know that she watches porn regularly but I can't talk about her about it cause I am shy and scared of what if she tells anyone or gets angry. I really want to chat about sex with her and if we could we can do something more. So I need your help guys 🙂🌚