Bruh moment, need advice

I accidentally sent a whole chapter of smut manhwa to my cousin at 3am over ig. He saw it. I realized after waking up at 9am and unsent, but this is super embarrassing. I need advice on how to follow up/whether I should follow up? Say nothing? Apologize and ask to never speak of it again? Tbh I think It's mostly embarrassing bc I'm a girl, if i were a guy I'd probably be able to laugh it off. (I still found it funny tho)

btw screw the share to instagram option when you accidentally hold down on a page while reading