Question about returned spicy pictures in Illinois facilities?

So I've been sending pics thru FreePrints to my LO at Hill CC, my question is I've kinda been pushing the limits seeing how spicy of pics I can get away with sending...well today he said he received some with a notice that 9 were not allowed BUT our stupid line got full of static and I couldn't understand what notification he had received or why he thought that they were going to be sent to HIS last known address (so his dad's house)..it was right before our convo ended so now I'm left panicking wondering if his 80yr old father's going to get me in fishnet stockings!! (There's no other address listed on FreePrints)