I've name changed as I don't want this to be linked with my other posts
Last night DS1 (16) was on my iPad as his phone is broken. DS2 uses it to watch youtube. Today, DS2 wanted to use it but it wouldn't turn on so he gave it to me and when it turned on, porn was up. I was shocked and showed my DP and he said if I wanted he’d speak to DS1 (DP isn't ds1s biological father). I'm not sure though as I don't want him to be embarrassed.
How would you approach this?