Confronted SD (19) about OF

I (m53) have been with my wife for about 15-16 years she has 2 daughters from a previous relationship which they’re both over 18 now and still live at home with us well one of them always has money and is going out so I got more curious as to what she’s doing I once came home early as I occasionally do and heard her in her room everyone was at work so I’m sure she assumed she was alone but I seen the door cracked and she had a ring light infront of her bed and she was wearing lingerie recording I went is what I assume I went to the kitchen and made a noise to kinda pretend I didn’t see a while later she came out in a robe and said ohh you’re home early I said ya what u up too she said just in my room on YouTube which I knew was a lie I said ohh nice were you making a video for YouTube or? And she kinda looked shocked but then said noooo why I simply said I seen u a bit when I first came in but didn’t mean too my bad she then kinda didn’t know what to say and said she had made an OF and it’s been successful for her that’s what it was but she said she doesn’t show herself naked she begged me not to tell her mom anything which I haven’t but can’t stop thinking about what happened I did some digging and found her page may have to sub to really see what she’s up too not sure if I should tho..