This past fall my dad was admitted to the hospital for over a week... I was my mom's sole caretaker, she has moderate dementia. My dad and mom refused the hospital's efforts to send him to rehab (he has mild brain damage and dementia, and acute kidney damage from this past incident). I now have medical POA and I have found a nursing facility that will not only take them both for their various needs, but will keep them together in the same room! How do I get them into the car to travel the couple of hours here, as they know there is a place for them but say they aren't leaving?!?! The nursing home will not go get them.
Which one has the delusion about cameras? I'd treat the delusion as a symptom, first checking for a UTI and perhaps getting a geriatric psych on board if that's not what's causing the issue.
Also it might be good to have their meds reviewed and see if there is anything they can be given to help them with this transition.
Lastly I would say relax and try to go with the flow. It doesn't all go away when they enter a facility, but they are better off than they were. Address problems as you can, but somethings are out of your control. ((((((hugs))))))
Again, let me be clear I am not saying in any way shape or form that this is sad or in anyway not the best thing for them but I know I often forget that Mom isn't operating at the same speed and level I am. It often takes her much longer to reason something out especially big ideas/topics than I think it should and when I don't put an expectation on it, let her take as much time as she needs it always goes much better. Give them some time, as much as they need to figure this out for themselves. Maybe having someone from the facility give them a tour, even if they have already and go over the "privacy" rules in the common areas like the shower but somehow making it clear there aren't any cameras (providing that's true) and or encouraging Mom and Dad to ask any questions they might have. Who knows maybe they got this idea from another resident or saw another resident who does have someone watching them shower for safety. But give yourself a break and don't take this personally, give them some time to settle in and adapt. Have the staff try to help them work through it too but unless they ask you, your parents I mean, don't be part of the front line on getting them to shower. Make sure the things you can are being done behind the scenes so to speak but don't give yourself any reason to think them refusing is directly aimed at you even. I mean you could casually ask perhaps if mom wants that special body wash she likes maybe just to open the door for her to bring up concerns with you if you feel that's important but let the facility staff take the heat for trying to get them to shower, not you. By the sounds of it your parents are hard wired to shower on a daily basis and they aren't going to be able to stand not getting a shower, even with sponge baths, for very much longer. Good luck and it bears repeating, ease up on yourself!
Remember that we are fighting a war & sometimes losing a battle can win the war or losing a battle in their defense can give you a promotion to general in their eyes - hope this helps & if it does then lets us all know with details in case we need ourselves at a later date