My iphone broke, now I need to send it back within 5 days. Will they see my pictures?

Okay so my phone broke completely out of nowhere. I have insurance so Verizon Wireless sent me a new phone, on the condition I send the old one back. Now I have a lot of dirty pictures of my current boyfriend and I and I'm terrified they might get a hold of them. Can someone please reassure me that they can't reach my pictures? It was updated to iOS7 so it had a password lock.

Just backup your old phone to your computer, then delete the pics from your phone. They probably will reach your pictures.

It depends on how broken it is. The pictures may be unreadable because of that. Otherwise they can if they want to devote time to it. Typically they do not.