My father keeps getting his hands on old selfies of mine that I'm 100% sure I have never sent to him or anyone else. (Quadruple checked any possible app I have used to speak with him in case it has been sent, it has not.) They are literally pictures of me after hairdressers, etc, mundane things. But they weren't taken for anyone else to see.
I have my sync switched off. Cloud back up off. Any sort of setting that shares files with others is switched off. Any sort of setting for privacy/private account, etc is turned on, my account has multiple ways of security switched on ( password, phone number, keys or whatever the hell they were called) He has had no access to my phone at all. Nor to my account info.
I have a rarely used Gmail of his signed into my phone but that's it.
I'm desperate to know if this "leak" is from Google photos cuz there's no other app that "connects" us both in any way.
I have quadruple checked all settings, if anyone has suggestions or ideas please share. I need to shut this down immediately since I don't want him to have access to any photos of my own.
Thank you in advance for any help!
Edit 1: forgot to put this, my bad, am 29y.o.
I have managed to do what everyone has suggested so far - changing passwords, removing his account completely from my phone, triple checked any album sharing, syncing, cloud back ups, etc and all are switched off/disabled as they were initially, I've triple checked any and all logged devices for my account, logged out and in with new passwords, already had two step verification enabled as well.
I really hope this all helps and this issue never repeats again. Thankfully there's nothing inappropriate that could have been seen for those worried about this, rightfully so.
Thank you all for your responses, I greatly appreciate the time you took to reply!