If i sync my iphone to itunes will the photos from my phone be on the computer?

I'm totally freaking out because I connected my iphone to my grandparents computer to try to get some music off their itunes library onto my phone. I clicked the sync this device button and it didn't work but then while my device was still connected, I saw that I could see all the pictures from my iphone. I'm worried because I have like 2, 000 photos from my camera roll on my iphone and if my grandparents saw any of them I would be totally screwedd! After unplugging my iphone, i searched the computer and couldn't find the pictures anywhere… So my question is - is there any possibility the photos from my iphone could still be on the computer somewhere OR on their itunes? And if so how do i delete them?

Nope your good
If the photos were to be back uped it be on you iCloud backed up so to speak which they hopefully don't have the pw for I'm guessing this Is a pc If its a pc there's a way were you can save all the pics to a folder on the computer but you dint and dint find so your good
Syncing is like refreshing your phone and updating what's on it so it can tell you on iTunes and you can decide to back the whole thing up Etc