strange sex places?

Ok I'm horribly turned on by the thought of doing it in the car but I know that's illegal and I so don't need to get in trouble! But I know so many people do that and I'm curious if anyone has any areas they'd recommend in general? It's hard to have sex at our house because I take care of my disabled mom and I don't want her to hear us because she's downstairs. We've done the hotel thing but once again I don't want anyone to have to listen to us I think that's rude. Anywayyyyy any advice or place ideas?